<html>
<head>
<script>
function loadXMLDoc()
{
var xmlhttp;
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
document.getElementById("myDiv").innerHTML=xmlhttp.responseText;
}
}
xmlhttp.open("GET","/try/ajax/demo_get.php?t=" + Math.random(),true);
xmlhttp.send();
}
</script>
</head><body>
<h2>AJAX</h2>
<button type="button" onclick="loadXMLDoc()">请求数据</button>
<p>多点击几次按钮看看时间是否会改变</p>
<div id="myDiv"></div>
</body>
</html>