// JavaScript Document
var xmlHttp = createXmlHttpRequestObject(); 
var ServerPage = "CloseMe.php";
function createXmlHttpRequestObject(){ //创建 XML Http Request 对象
  var xmlHttp = "";
		 try{
			xmlHttp = new XMLHttpRequest();
			  if(xmlHttp.overrideMimeType)
			  		xmlHttp.overrideMimeType("text/xml");
		 }
		 catch(e){
			 var xmlHttpVersions = new Array("MSXML2.XMLHTTP.6.0",
											  "MSXML2.XMLHTTP.5.0",
											  "MSXML2.XMLHTTP.4.0",
											  "MSXML2.XMLHTTP.3.0",
											  "MSXML2.XMLHTTP",
											  "Microsoft.XMLHTTP");
			 for(var i=0;i<xmlHttpVersions.length && !xmlHttp; i++){
				 try{
					 xmlHttp = new ActiveXObject(xmlHttpVersions[i]);
				 }
				 catch (e) {}
			 }
		 } 
		 return xmlHttp;
}
function  CloseMe(){ //使用 XML Http Request 对象创建异步HTTP请求 
  var url = ServerPage;
	if(xmlHttp.readyState == 4 || xmlHttp.readyState == 0){
		xmlHttp.open("GET",url,true);
		xmlHttp.setRequestHeader("Content-Type","text/xml;charset=utf-8;");
		xmlHttp.onreadystatechange = outdata;
		xmlHttp.send(null);
	}
	 
}
function outdata(){ //获取服务器返回的消息 
  if(xmlHttp.readyState == 4){
	  if (xmlHttp.status == 200){
		 
	  } 
	} 
}