Ajax xmlHttp.responseText 返回值解决方案
日期：2014-05-16 浏览次数：20823 次
Ajax xmlHttp.responseText 返回值
我在用ajax时遇到如下问题,见下面js代码的红字部分.不知道怎么得到正确的值.求解释
var IsCode;
var xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
{
alert("您的浏览器不支持AJAX");
return;
}
xmlHttp.onreadystatechange=function()
{
if(xmlHttp.readyState==4)
{
if(xmlHttp.status==200)
{
IsCode=xmlHttp.responseText;
alert(IsCode); /// 这里得到的是整个HTML代码
}
// document.getElementById("IDinfo").innerHTML=xmlHttp.responseText;
}
}
xmlHttp.open("POST","<%=request.getContextPath()%>/jsp/IDinfo.jsp?req=2&code="+document.getElementById("code").value,true);
xmlHttp.send(null);
alert(IsCode); //这里得到的却是undefined
IDinfo.jsp代码
<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<jsp:useBean id="register" scope="session"
class="edu.tongji.sse.p082940.lxj.javabean.Register"></jsp:useBean>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.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">
-->
</head>
<body> <% if(request.getParameter("req").equals("1")) {%>
<font size="2" style="color:red;">&a
我在用ajax时遇到如下问题,见下面js代码的红字部分.不知道怎么得到正确的值.求解释
var IsCode;
var xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
{
alert("您的浏览器不支持AJAX");
return;
}
xmlHttp.onreadystatechange=function()
{
if(xmlHttp.readyState==4)
{
if(xmlHttp.status==200)
{
IsCode=xmlHttp.responseText;
alert(IsCode); /// 这里得到的是整个HTML代码
}
// document.getElementById("IDinfo").innerHTML=xmlHttp.responseText;
}
}
xmlHttp.open("POST","<%=request.getContextPath()%>/jsp/IDinfo.jsp?req=2&code="+document.getElementById("code").value,true);
xmlHttp.send(null);
alert(IsCode); //这里得到的却是undefined
IDinfo.jsp代码
<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<jsp:useBean id="register" scope="session"
class="edu.tongji.sse.p082940.lxj.javabean.Register"></jsp:useBean>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.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">
-->
</head>
<body> <% if(request.getParameter("req").equals("1")) {%>
<font size="2" style="color:red;">&a
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