<html>
<title>ajaxStudy</title>
<body>
<script type="text/javascript">
var xmlHttp;
function CreateHttpRequest()
{
try
{
// Firefox, Opera 8.0+, Safari
xmlHttp=new XMLHttpRequest();
}
catch (e)
{
// Internet Explorer
try
{
xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
//ie6+
}
catch (e)
{
try
{
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
//ie5
}
catch (e)
{
alert("您的浏览器不支持AJAX！");
return false;
}
}
}
}
function ajaxfun()
{
CreateHttpRequest();
xmlHttp.onreadystatechange=function()
{
if(xmlHttp.readyState==4)
{
document.myForm.time.value=xmlHttp.responseText;
alert(xmlHttp.readyState);
}
}
xmlHttp.open("GET","time.asp",true)
xmlHttp.send(null);
}
</script>
<form name="myForm">
用户: <input type="text" name="username" onKeyup="ajaxfun()" />
时间: <input type="text" name="time" />
</form>
</body>
</html>