function getXHR() 
{
var xhr;
 try
    {
   // Firefox, Opera 8.0+, Safari
    xhr=new XMLHttpRequest();
    }
 catch (e)
    {
  // Internet Explorer
   try
      {
      xhr=new ActiveXObject("Msxml2.XMLHTTP");
      }
   catch (e)
      {

      try
         {
         xhr=new ActiveXObject("Microsoft.XMLHTTP");
         }
      catch (e)
         {
         alert("ÄúµÄä¯ÀÀÆ÷²»Ö§³ÖAJAX£¡");
         return null;
         }
      }
} 
if(!xhr&&typeof XMLHttpRequest!='undefined') 
{
xhr=new XMLHttpRequest();
}
return xhr;
}
function openXHR(method,url,callback) {
var xhr=getXHR();
xhr.open(method,url);
xhr.onreadystatechange=function() {
if(xhr.readyState!=4)return;
callback(xhr);
}
xhr.send(null);
}
function loadXML(method,url,callback) {
var xhr=getXHR();
xhr.open(method,url);
xhr.setRequestHeader("Content-Type","text/xml");
xhr.setRequestHeader("Content-Type","GBK");
xhr.onreadystatechange=function() {
if(xhr.readyState!=4)return;
callback(xhr);
}
xhr.send(null);
}
function $(selector)
{
return document.getElementById(selector);
}
function send(obj,id)
{
  var lia = document.getElementById("menulist").getElementsByTagName("li");
	var lialen = lia.length;
	for(i=0; i<lialen; i++){
		if(lia[i].className=="curMenu")
		{
		lia[i].className = "";
		}
	}
	obj.className="curMenu";
	getresult(id);
}