城杆

<script>
 function f(){
 var req =new ActiveXObject("Microsoft.XMLHTTP");
 req.open("GET","t.asp?t1="+t1.value, true);
 req.onreadystatechange = function(){
 　 if (req.readyState == 4) {
 　 if (req.status == 200) {
 　　 msg.innerText = req.responseXML.documentElement.tagName;
 }
 }
 }
 req.send(null);
 }
 </script>
 <div>1：显示"OK"; 其他字符:显示"Error"</div>
 <input id=t1 value=1>
 <input type=button value="检测" onclick="javascript:f()">
 <div id=msg></div>

<%
 Response.ContentType="text/xml"
 if request.querystring("t1")="1" then
 response.write("<OK/>")
 else
 response.write("<ERROR/>")
 end if
 %>