日期:2014-05-16 浏览次数:20815 次
<!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=utf-8" />
<title>Ajax技术加载HTML文档</title>
<script type="text/javascript">
function Ajax(){ //通过这个函数来异步获取信息
var xmlHttpReq;
if (window.ActiveXObject){ //针对IE6
xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
}
else if (window.XMLHttpRequest){ //针对除IE6 以外的浏览器
xmlHttpReq = new XMLHttpRequest();//实例化一个XMLHttpRequest
}
//xmlHttpReq.setRequestHeader("Cache-Control","no-cache");
if(xmlHttpReq!= null){ //如果对象实例化成功
//var url = "9-2.html?r="&r=" + Math.random();
xmlHttpReq.open("POST","9-2.html?t="+ new Date().getTime()); //调用open()方法并采用异步方式
xmlHttpReq.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
xmlHttpReq.onreadystatechange=RequestCallBack; //设置回调函数
xmlHttpReq.send(null); //因为使用get方式提交,所以可以使用null参调用
}
function RequestCallBack(){ //一旦readyState值改变,将会调用这个函数
if(xmlHttpReq.readyState == 4 && xmlHttpReq.status == 200){
document.getElementById("target").innerHTML = xmlHttpReq.responseText;
}
}
}
</script>
</head>
<body>
<input type="button" value="Ajax载入" onclick="Ajax();" />
<div id="target"></div>
</body>
</html>