<html>
<head>
<title> New Document </title>
<script type="text/javastript">
var xmlobj;
function CreateXMLHttpRequest()
{
if(window.ActiveXObject)
{
xmlobj = new ActiveXObject("Microsoft.XMLHTTP");
}
else if(window.XMLHttpRequest)
{
xmlobj = new XMLHttpRequest();
}
}
function SubmitArticle()
{
CreateXMLHttpRequest();
var parm = "chaxun="+"selteachbuild="+document.getElementById("selteachbuild").value+ "thetime=" + document.getElementById("thetime").value;
xmlobj.open("POST", "http://classroom.upc.edu.cn/kebiao_look.jsp", true);
xmlobj.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;");
xmlobj.onreadystatechange = StatHandler;
xmlobj.send(parm);
}
function StatHandler()
{
document.getElementById("showpage").innerHTML = xmlobj.responseText;
}
</script>
</head>
<body>
<p><form action="">
<input type="text" id="mold">
<input name=thetime value="2013-05-30" style="width:80px;font-family:arial;font-size:15">
<font face="隶书" size="4pt" >教学楼：</font>
<select name="selteachbuild" >
<option value=东环>东环</option>
<option value=西环>西环</option>
<option value=南堂>南堂</option>
<option value=东廊>东廊</option>
<option value=西廊>西廊</option>
<option value=多媒体>多媒体</option>
<option value=南教楼>南教楼</option>
<option value=文理楼>文理楼</option>
</select>
<input name="chaxun" type="button" value="查询" onclick="SubmitArtcle();">
</form></p>
<p><div id="showpage"></div></p>
</body>
</html>
想通过AJAX达到不刷新页面获取HTML界面的目的。但是提交表单之后，总是得不到回复，怎么回事呢？
