javascript远程获取页面源码

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>  
<%  
    String path = request.getContextPath();  
    String basePath = request.getScheme() + "://"  
            + request.getServerName() + ":" + request.getServerPort()  
            + path + "/";  
%>  
<%@include file="/common/taglibs.jsp"%>  
<html>  
    <head>  
        <title></title>  
        <script type="text/javascript" language="javascript">  
        var http_request = false;   
        function makeRequest(url)  {   
            http_request = false;    
            if (window.XMLHttpRequest)  { // Mozilla, Safari,...  
                http_request = new XMLHttpRequest();   
                if (http_request.overrideMimeType)  { http_request.overrideMimeType("text/xml"); }   
            }    
            else if (window.ActiveXObject)  { // IE   
                try  { http_request = new ActiveXObject("Msxml2.XMLHTTP"); }    
                catch (e)  {   
                    try  { http_request = new ActiveXObject("Microsoft.XMLHTTP"); }    
                    catch (e)  {}   
                }   
            }   
            if (!http_request){   
                return false;   
            }   
            http_request.onreadystatechange = alertContents;   
            http_request.open("GET", url, true);   
            http_request.send(null);   
        }   
        function alertContents() {   
            if (http_request.readyState == 4)  {   
                if (http_request.status == 200)  {   
                    content.innerText = http_request.responseText;   
                }    
                else  {   
                }   
            }   
        }  
        window.onload = makeRequest('${toupiaoCode}');  
    </script>  
    </head>  
    <body>  
        <table align="center">  
            <tr>  
                <td colspan="2">  
                    <textarea name="content" id="content"  
                        style="width: 500px; height: 300px;" rows="1" cols="20"></textarea>  
                </td>  
            </tr>  
        </table>  
    </body>  
</html>

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