ajax问题 高手进来指教 急！

我用myEclipse5.0可以正确运行一个AJAX简单运行的例子
     但是我朋友哪是myEclipse6.0，问题就出现了
         xmlHtmlRequest为空或者不是对象。请各位高人朋友帮忙看看 JSP代码如下：
     <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<title>Ajax example</title>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'login.jsp' starting page</title>
    
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">    
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<script type="text/javascript">
var XMLHttpReq;
function createXMLHttpRequest()
{
 if(window.XMLHttpRequest){
      XMLHttpReq = new XMLHttpRequest();
         }else if(window.ActiveXOject)
                 {
                  try{
                  XMLHttpReq = new ActiveXObject("Msxm12.XMLHTTP");
                     }catch (e){
                                try{
                                   XMLHttpReq = new ActiveXOject("Microsoft.XMLHTTP"); 
                                   }catch(e){
                                            }  
                                             
                                } 
                 }   
}
//发送请求函数
function sendRequest(url){
                         createXMLHttpRequest();
                         XMLHttpReq.open("GET",url,true);
                         XMLHttpReq.onreadystatechange = processResponse; //指定响应函数
                         XMLHttpReq.send(null);
                         }
//处理返回信息函数
function processResponse(){
                          if(XMLHttpReq.readyState == 4){
                             if(XMLHttpReq.status == 200){
                                var res = XMLHttpReq.responseXML.getElementsByTagName("res")[0].firstChild.data;            
                                window.alert(res);                         
                                                         }else{
                                                               window.alert("您所请求的页面有问题。");
                                                              }                      
                                                        }  
                          }
    //注册函数
    function signUp(){
             var uname = document.myform.uname.value;
             var psw = document.myform.psw.value;
             var psw2 = document.myform.psw2.value;
             if(uname == ""){
                    window.alert("用户名不能为空"); 
                    document.myform.uname.focus();
                    return false; 
                            }
             else if(psw != psw2){
                    window.alert("两次密码不正确");
                    document.myform.psw.focus();
                    return false;
                                 }
             else{
                  sendRequest('signUp?uname='+ uname + '&psw=' +psw);
                 }                     
                     }                         
</script>
  </head>
  <body vLink ="#006666" link="#003366" bgColor="#E0F0F8">
    <form action="" method="post" name="myform">
    用户名：<input size="15" name="uname"><p>
    密码：<input type="password" size="15" name="psw"><p>
    重输密码：<input type="password" size="15" name="psw2"><p>
    <input type="button" value="注册" onclick="signUp()">
    </form>
  </body>
</html>   

解决方案 »

  1.   

    和浏览器有关.
     new ActiveXOject("...");  搜一下用的浏览器所对应的参数.
    程序应该没有问题的.
      

  2.   

    没看出问题,这样试试吧function createXMLHttpRequest() {//如果是IE，用activexobject
    if (window.ActiveXObject) {
    xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
    }//如果其它浏览器就用XMLHttpRequest
    else if (window.XMLHttpRequest) {
    xmlHttp = new XMLHttpRequest();
    }
    }
      

  3.   

    单词打错if(window.XMLHttpRequest){ 
          XMLHttpReq = new XMLHttpRequest(); 
                           //ActiveXObject
             }else if(window.ActiveXOject) 
                     { 
                      try{ 
                      XMLHttpReq = new ActiveXObject("Msxm12.XMLHTTP"); 
                         }catch (e){ 
                                    try{ 
                                       XMLHttpReq = new ActiveXOject("Microsoft.XMLHTTP");  
                                       }catch(e){ 
                                                }   
                                                  
                                    }  
                     }    
    }