diff --git a/en/adblock/index.html b/en/adblock/index.html
index 0c9ba86..c6b2bae 100644
--- a/en/adblock/index.html
+++ b/en/adblock/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>AD blocking</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/adblock_domain/index.html b/en/adblock_domain/index.html
index 503b186..39990bb 100644
--- a/en/adblock_domain/index.html
+++ b/en/adblock_domain/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>Blocking domain trees</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/bookmarklet/index.html b/en/bookmarklet/index.html
index 7a77016..f0212bf 100644
--- a/en/bookmarklet/index.html
+++ b/en/bookmarklet/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>Bookmarklets</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/changelog/index.html b/en/changelog/index.html
index 1ea9fae..3e3336d 100644
--- a/en/changelog/index.html
+++ b/en/changelog/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>Change log</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/en/filecap/index.html b/en/filecap/index.html
index 85b174e..dee50fa 100644
--- a/en/filecap/index.html
+++ b/en/filecap/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>Custom file handling</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/filenames/index.html b/en/filenames/index.html
index a0f821b..fe0b4b2 100644
--- a/en/filenames/index.html
+++ b/en/filenames/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>Configuration folders/files</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/globalcss/index.html b/en/globalcss/index.html
index 136cebc..1c5f64c 100644
--- a/en/globalcss/index.html
+++ b/en/globalcss/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>CSS样式</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/icons/index.html b/en/icons/index.html
index 0e47758..50ec65b 100644
--- a/en/icons/index.html
+++ b/en/icons/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>Toolbar customization</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/index.html b/en/index.html
index a4c50f2..94532b4 100644
--- a/en/index.html
+++ b/en/index.html
@@ -8,19 +8,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title></title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
@@ -29,11 +43,6 @@
 
 <ul class="posts">
   
-  <li class="post">
-    <a href="../zh/index.html">
-      <span>中文</span>
-    </a>
-  </li>
   <li class="post">
     <a href="https://s1.asytech.cn/s/tQrgT5kBRg8Trry">
       <span>Download the uweb browser</span>
diff --git a/en/links/index.html b/en/links/index.html
index 960413b..2c479cf 100644
--- a/en/links/index.html
+++ b/en/links/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>Links</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/longclick/index.html b/en/longclick/index.html
index 6ccdff0..0e44f3a 100644
--- a/en/longclick/index.html
+++ b/en/longclick/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>Long pressed link menu</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/pccopy/index.html b/en/pccopy/index.html
index 60f76e4..510f81b 100644
--- a/en/pccopy/index.html
+++ b/en/pccopy/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>Text selection</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/sitejs/index.html b/en/sitejs/index.html
index 7cc2021..6ca7d82 100644
--- a/en/sitejs/index.html
+++ b/en/sitejs/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>Javascript and CSS for domains</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/sitemap/index.html b/en/sitemap/index.html
index ae3076a..95a8951 100644
--- a/en/sitemap/index.html
+++ b/en/sitemap/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>Site map</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/tags/adblock/index.html b/en/tags/adblock/index.html
index 00b9b20..c70060d 100644
--- a/en/tags/adblock/index.html
+++ b/en/tags/adblock/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>adblock</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/en/tags/clipboard/index.html b/en/tags/clipboard/index.html
index 09ec91f..3f4fc57 100644
--- a/en/tags/clipboard/index.html
+++ b/en/tags/clipboard/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>clipboard</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/en/tags/css/index.html b/en/tags/css/index.html
index c51d86d..56ec6ca 100644
--- a/en/tags/css/index.html
+++ b/en/tags/css/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>css</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/tags/curl/index.html b/en/tags/curl/index.html
index e6058b5..8ce01c1 100644
--- a/en/tags/curl/index.html
+++ b/en/tags/curl/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>curl</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/tags/javascript/index.html b/en/tags/javascript/index.html
index 2ec77f8..dba4438 100644
--- a/en/tags/javascript/index.html
+++ b/en/tags/javascript/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>javascript</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/tags/pc/index.html b/en/tags/pc/index.html
index dff6c7d..3713fde 100644
--- a/en/tags/pc/index.html
+++ b/en/tags/pc/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>PC</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/tags/ssh/index.html b/en/tags/ssh/index.html
index 8261db8..543f207 100644
--- a/en/tags/ssh/index.html
+++ b/en/tags/ssh/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>ssh</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/tags/termux/index.html b/en/tags/termux/index.html
index 6bbfbf1..9aaae38 100644
--- a/en/tags/termux/index.html
+++ b/en/tags/termux/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>termux</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/tags/windows/index.html b/en/tags/windows/index.html
index 3ae96e3..829d92c 100644
--- a/en/tags/windows/index.html
+++ b/en/tags/windows/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>Windows</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/adblock/index.html b/zh/adblock/index.html
index 1b9c4e9..b58cc91 100644
--- a/zh/adblock/index.html
+++ b/zh/adblock/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>信息隐藏技术总览</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/adblock_css/index.html b/zh/adblock_css/index.html
index 082d1ce..37b204a 100644
--- a/zh/adblock_css/index.html
+++ b/zh/adblock_css/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>利用用户自定义样式屏蔽不良信息</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/adblock_domain/index.html b/zh/adblock_domain/index.html
index aef536b..5ba5239 100644
--- a/zh/adblock_domain/index.html
+++ b/zh/adblock_domain/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>绝杀完整域名树</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/androidtv/index.html b/zh/androidtv/index.html
index 423dcf3..7425616 100644
--- a/zh/androidtv/index.html
+++ b/zh/androidtv/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>Android TV</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/bc/index.html b/zh/bc/index.html
index e84bb51..b828b30 100644
--- a/zh/bc/index.html
+++ b/zh/bc/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>超级计算器(bc)</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/bookmark/index.html b/zh/bookmark/index.html
index 3276c44..95d75ea 100644
--- a/zh/bookmark/index.html
+++ b/zh/bookmark/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>常用书签</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/bookmarklet/index.html b/zh/bookmarklet/index.html
index f97f67c..3d6134d 100644
--- a/zh/bookmarklet/index.html
+++ b/zh/bookmarklet/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>小书签</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/cmd/index.html b/zh/cmd/index.html
index 4ba9b79..ab7ed44 100644
--- a/zh/cmd/index.html
+++ b/zh/cmd/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>一键执行任意预定义命令（附手机PC剪贴板互通）</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/filecap/index.html b/zh/filecap/index.html
index aa1f8da..894539a 100644
--- a/zh/filecap/index.html
+++ b/zh/filecap/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>利用文件预处理预览/查看/播放一切可下载资源</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/filemanager/index.html b/zh/filemanager/index.html
index 4c5f106..55048e8 100644
--- a/zh/filemanager/index.html
+++ b/zh/filemanager/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>文件管理器及文件挑选并批量处理</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/filenames/index.html b/zh/filenames/index.html
index 7aebd8e..f1ed7ed 100644
--- a/zh/filenames/index.html
+++ b/zh/filenames/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>超微浏览器配置文件列表</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/gesture/index.html b/zh/gesture/index.html
index 09aa4a4..9375cd4 100644
--- a/zh/gesture/index.html
+++ b/zh/gesture/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>手势</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/globalcss/index.html b/zh/globalcss/index.html
index 1e3d25a..6fbd405 100644
--- a/zh/globalcss/index.html
+++ b/zh/globalcss/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>CSS样式</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/gnuplot/index.html b/zh/gnuplot/index.html
index b7debae..0da2e2b 100644
--- a/zh/gnuplot/index.html
+++ b/zh/gnuplot/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>利用浏览器地址栏对函数作图</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/hosts/index.html b/zh/hosts/index.html
index 5c92699..0e7c013 100644
--- a/zh/hosts/index.html
+++ b/zh/hosts/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>加速访问国外网站</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/html5/index.html b/zh/html5/index.html
index d21f4ab..774217e 100644
--- a/zh/html5/index.html
+++ b/zh/html5/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>html5应用</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/icons/index.html b/zh/icons/index.html
index 15180ce..b6e7f39 100644
--- a/zh/icons/index.html
+++ b/zh/icons/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>工具栏定制</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/index.html b/zh/index.html
index 97f8802..d346bea 100644
--- a/zh/index.html
+++ b/zh/index.html
@@ -8,19 +8,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title></title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
@@ -29,11 +43,6 @@
 
 <ul class="posts">
   
-  <li class="post">
-    <a href="../en/index.html">
-      <span>English</span>
-    </a>
-  </li>
   <li class="post">
     <a href="searchurl/donate.html">
       <span>请一杯咖啡，提一个要求</span>
diff --git a/zh/links/index.html b/zh/links/index.html
index 871e87b..6e62973 100644
--- a/zh/links/index.html
+++ b/zh/links/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>常用链接</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/loadbt/index.html b/zh/loadbt/index.html
index 7cabf80..e937678 100644
--- a/zh/loadbt/index.html
+++ b/zh/loadbt/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>离线下载</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/logcat/index.html b/zh/logcat/index.html
index e0cc266..6f54932 100644
--- a/zh/logcat/index.html
+++ b/zh/logcat/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>安卓系统出错诊断</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/longclick/index.html b/zh/longclick/index.html
index 42dcbc4..b4203d9 100644
--- a/zh/longclick/index.html
+++ b/zh/longclick/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>长按链接弹出菜单</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/multiaccount/index.html b/zh/multiaccount/index.html
index 6935058..e73edab 100644
--- a/zh/multiaccount/index.html
+++ b/zh/multiaccount/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>利用多账号登录获取资源</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/offlinecache/index.html b/zh/offlinecache/index.html
index f6e7f8d..21c2e03 100644
--- a/zh/offlinecache/index.html
+++ b/zh/offlinecache/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>装载网站离线资源</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/pccopy/index.html b/zh/pccopy/index.html
index 02d7fd1..7e7ee64 100644
--- a/zh/pccopy/index.html
+++ b/zh/pccopy/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>操作选中（富）文本／元素</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/pcdown/index.html b/zh/pcdown/index.html
index 5f80ce3..64a722f 100644
--- a/zh/pcdown/index.html
+++ b/zh/pcdown/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>浏览器一键控制台式机/服务器下载资源</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/redirect/index.html b/zh/redirect/index.html
index 24ee995..fdb66ff 100644
--- a/zh/redirect/index.html
+++ b/zh/redirect/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>重定向国外网址至国内镜像（附编辑本地文件）</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/searchcat/index.html b/zh/searchcat/index.html
index cec2db1..5bf1e4f 100644
--- a/zh/searchcat/index.html
+++ b/zh/searchcat/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>分类多引擎搜索</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/sitejs/index.html b/zh/sitejs/index.html
index 2349911..826357f 100644
--- a/zh/sitejs/index.html
+++ b/zh/sitejs/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>特定网址用户脚本及样式</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/sitemap/index.html b/zh/sitemap/index.html
index 1cc24a0..2c3390d 100644
--- a/zh/sitemap/index.html
+++ b/zh/sitemap/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>技巧网站导航</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/css/index.html b/zh/tags/css/index.html
index 1f889d3..870e70c 100644
--- a/zh/tags/css/index.html
+++ b/zh/tags/css/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>css</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/curl/index.html b/zh/tags/curl/index.html
index 76dc3b5..fc8d727 100644
--- a/zh/tags/curl/index.html
+++ b/zh/tags/curl/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>curl</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/javascript/index.html b/zh/tags/javascript/index.html
index 8feed89..2b317ce 100644
--- a/zh/tags/javascript/index.html
+++ b/zh/tags/javascript/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>javascript</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/pc/index.html b/zh/tags/pc/index.html
index adddc34..bc95110 100644
--- a/zh/tags/pc/index.html
+++ b/zh/tags/pc/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>PC</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/ssh/index.html b/zh/tags/ssh/index.html
index 2b6c8cb..1aabe8f 100644
--- a/zh/tags/ssh/index.html
+++ b/zh/tags/ssh/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>ssh</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/tdict/index.html b/zh/tags/tdict/index.html
index 9aacab7..c940a8d 100644
--- a/zh/tags/tdict/index.html
+++ b/zh/tags/tdict/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>tdict</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/termux/index.html b/zh/tags/termux/index.html
index 69bd244..844e0e3 100644
--- a/zh/tags/termux/index.html
+++ b/zh/tags/termux/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>termux</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/tools/index.html b/zh/tags/tools/index.html
index 65754f8..158d8bf 100644
--- a/zh/tags/tools/index.html
+++ b/zh/tags/tools/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>tools</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/windows/index.html b/zh/tags/windows/index.html
index 793f8e0..c7b182f 100644
--- a/zh/tags/windows/index.html
+++ b/zh/tags/windows/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>Windows</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/下载/index.html b/zh/tags/下载/index.html
index 0d139e2..14dbd35 100644
--- a/zh/tags/下载/index.html
+++ b/zh/tags/下载/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>下载</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/不良信息屏蔽/index.html b/zh/tags/不良信息屏蔽/index.html
index 07309a3..77a2390 100644
--- a/zh/tags/不良信息屏蔽/index.html
+++ b/zh/tags/不良信息屏蔽/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>不良信息屏蔽</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/剪贴板/index.html b/zh/tags/剪贴板/index.html
index 462c05e..e73d89d 100644
--- a/zh/tags/剪贴板/index.html
+++ b/zh/tags/剪贴板/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>剪贴板</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/国外网址/index.html b/zh/tags/国外网址/index.html
index 14150af..73db36d 100644
--- a/zh/tags/国外网址/index.html
+++ b/zh/tags/国外网址/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>国外网址</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/搜索/index.html b/zh/tags/搜索/index.html
index c4bcb6a..f7e2676 100644
--- a/zh/tags/搜索/index.html
+++ b/zh/tags/搜索/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>搜索</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/电视/index.html b/zh/tags/电视/index.html
index c3b7d6a..829663a 100644
--- a/zh/tags/电视/index.html
+++ b/zh/tags/电视/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>电视</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/离线/index.html b/zh/tags/离线/index.html
index d6507f4..eef42a7 100644
--- a/zh/tags/离线/index.html
+++ b/zh/tags/离线/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>离线</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/网盘/index.html b/zh/tags/网盘/index.html
index 535c4d1..a5617af 100644
--- a/zh/tags/网盘/index.html
+++ b/zh/tags/网盘/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>网盘</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/资源/index.html b/zh/tags/资源/index.html
index 0a1b748..5d92fe1 100644
--- a/zh/tags/资源/index.html
+++ b/zh/tags/资源/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>资源</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/重定向/index.html b/zh/tags/重定向/index.html
index 67ae836..fbed70a 100644
--- a/zh/tags/重定向/index.html
+++ b/zh/tags/重定向/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>重定向</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tcron/index.html b/zh/tcron/index.html
index 522aea6..1bf886b 100644
--- a/zh/tcron/index.html
+++ b/zh/tcron/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>定时脚本</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tips/index.html b/zh/tips/index.html
index cc25aa4..8ca071e 100644
--- a/zh/tips/index.html
+++ b/zh/tips/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>小技巧</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tools/index.html b/zh/tools/index.html
index 339ee91..9144919 100644
--- a/zh/tools/index.html
+++ b/zh/tools/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>工具汇总</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tvlive/index.html b/zh/tvlive/index.html
index 14330b2..36b5c71 100644
--- a/zh/tvlive/index.html
+++ b/zh/tvlive/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>电视直播</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/urls/index.html b/zh/urls/index.html
index 578c659..6b45ffd 100644
--- a/zh/urls/index.html
+++ b/zh/urls/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>便利链接</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/video/index.html b/zh/video/index.html
index 253615b..b0d6e2b 100644
--- a/zh/video/index.html
+++ b/zh/video/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>视频播放小窍门</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
