Ajax加载信息提示实例(转)

<?xml version="1.0" encoding="gb2312"?>
<!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>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>XMLHTTP</title>
</head>

<body>

<div id="board"></div>

<script type="text/javascript" language="javascript">
<!--
function CreateHTTPObject()
{
    var xmlhttp;
   
    try
    {
        xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
    }
    catch (e)
    {
        try
        {
            xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
        }
        catch (e)
        {
            xmlhttp = false;
        }
    }
   
    if (!xmlhttp && typeof XMLHttpRequest!='undefined')
    {
        try
        {
            xmlhttp = new XMLHttpRequest();
        }
        catch (e)
        {
            xmlhttp=false;
        }
    }
   
    if (!xmlhttp && window.createRequest)
    {
        try
        {
            xmlhttp = window.createRequest();
        }
        catch (e)
        {
            xmlhttp=false;
        }
    }
   
    return xmlhttp;
}


//使用全局变量 xmlhttp
function OnReadyStateChng()
{
    if (xmlhttp.readyState == 0)
    {
        document.getElementById("board").innerHTML = "尚未初始化";
    }
    else if (xmlhttp.readyState == 1)
    {
        document.getElementById("board").innerHTML = "正在加载";
    }
    else if (xmlhttp.readyState == 2)
    {
        document.getElementById("board").innerHTML = "加载完毕";
    }
    else if (xmlhttp.readyState == 3)
    {
        document.getElementById("board").innerHTML = "正在处理";
    }
    else if (xmlhttp.readyState == 4)
    {
        document.getElementById("board").innerHTML = xmlhttp.responseText; //处理完毕
    }
   
}

var xmlhttp = CreateHTTPObject();
if (xmlhttp)
{
    xmlhttp.open("GET", "http://www.cftea.com/", true);
    xmlhttp.onreadystatechange = OnReadyStateChng;
    xmlhttp.send(null);
}
-->
</script>

</body>

</html>

原文地址:https://www.cnblogs.com/Godblessyou/p/1018918.html