用javascript打造搜索工具栏

Mansonzh

2006-09-24

一:最终效果
用javascript打造搜索工具栏

二:原理

如果你在Yahoo中搜索“中国”，那么在浏览器的地址栏将得到这样一串地址：http://search.cn.yahoo.com/search?ei=gbk&fr=fp-tab-web-ycn&meta=vl%
3Dlang_zh-CN%26vl%3Dlang_zh-TW&pid=ysearch&source=ysearch_www_hp_button
&p=%D6%D0%B9%FA&Submit=
看上去有些乱了，简化一下：http://search.cn.yahoo.com/search?&p=%D6%D0%B9%FA
这就是关键.其中&p=%D6%D0%B9%FA是搜索的关键字参数，而%D6%D0%B9%FA是“中国”的
Url编码。OK，我们只要能构造出这样的编码就好了。

三：URL编码
JavaScript的encodeURIComponent()函数可以完成编码工作。
比如上面的例子我们可以用“http://search.cn.yahoo.com/search?&p=”＋encodeURIComponent(“中国”)；来完成。

四：代码
(点击加号展开）

代码如下：

 <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Search.aspx.cs" Inherits="Search" %> 

 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 

 <html xmlns="http://www.w3.org/1999/xhtml" > 
 <head runat="server"> 
     <title>Search</title> 
 <script language="javascript" type="text/javascript"> 
 // <!CDATA[ 

 function GetEncodeOfKey() 
 { 
     var strKey = window.document.getElementById("Text_Key").value;       
     return  encodeURIComponent(strKey);  
 } 

 function GetUrl(site) 
 { 
     var encode=GetEncodeOfKey(); 

     //web 
     if(document.getElementById("RadioButtonList_Kind_0").checked) 
     { 
         if(site=="google") 
         { 
             return "http://www.google.com/search?q="+encode+"&ei=UTF-8"; 
         } 
         else 
         { 
             return "http://search.yahoo.com/search?p="+encode+"&ei=UTF-8"; 
         } 
     } 
     //mp3 
     else if(document.getElementById("RadioButtonList_Kind_1").checked) 
     { 
         if(site=="google") 
         { 
             return "http://www.google.com/search?q="+encode+" mp3"+"&ei=UTF-8"; 
         } 
         else 
         { 
             return "http://audio.search.yahoo.com/search/audio?&p="+encode+"&ei=UTF-8"; 

         } 
     } 
     //img 
     else if(document.getElementById("RadioButtonList_Kind_2").checked) 
     { 
         if(site=="google") 
         { 
             return "http://images.google.com/images?q="+encode+"&ei=UTF-8"; 
         } 
         else 
         { 
             return "http://images.search.yahoo.com/search/images?p="+encode+"&ei=UTF-8"; 
         } 
     } 
     else 
     { 
         //alert("err"); 
     } 

      
 } 

 function Button_Google_onclick()  
 { 
     window.open(GetUrl("google")); 
 } 

 function Button_Yahoo_onclick()  
 { 
     window.open(GetUrl("yahoo")); 
 } 

 // ]]> 
 </script> 
 </head> 
 <body> 
     <form id="form1" runat="server"> 
     <div> 
         <br /> 
         <br /> 
         <strong><span style="font-size: 24pt; color: #336633">Search<br /> 
         </span></strong> 
     </div> 
     <hr style="position: relative" /> 
         <br /> 
         <table style="left: 0px; position: relative; top: 0px"> 
             <tr> 
                 <td style="width: 31px; height: 21px"> 
                     <span style="font-family: Terminal">Key</span></td> 
                 <td style="width: 253px; height: 21px"> 
                     <input id="Text_Key" style="width: 248px; position: relative" type="text" /></td> 
                 <td style="width: 175px; height: 21px"> 
                     <asp:RadioButtonList ID="RadioButtonList_Kind" runat="server" RepeatDirection="Horizontal" 
                         Style="position: relative" Font-Names="terminal"> 
                         <asp:ListItem Selected="True">Web</asp:ListItem> 
                         <asp:ListItem>Mp3</asp:ListItem> 
                         <asp:ListItem>Image</asp:ListItem> 
                     </asp:RadioButtonList></td> 
             </tr> 
             <tr> 
                 <td style="width: 31px"> 
                 </td> 
                 <td colspan="2"> 
                     <input id="Button_Google" style="width: 80px; position: relative" type="button" value="Google" onclick="return Button_Google_onclick()" /> 
                               
                     <input id="Button_Yahoo" style="left: -29px; width: 104px; position: relative" type="button" 
                         value="Yahoo!" onclick="return Button_Yahoo_onclick()" /></td> 
         </table> 
         <br /> 
         <hr style="position: relative" /> 
         <asp:HyperLink ID="HyperLink_Home" runat="server" NavigateUrl="~/Default.aspx" Style="position: relative">Home</asp:HyperLink></form> 
 </body> 
 </html>

javascript 工具栏