简单不错的AJAX方式获取函数

// JavaScript Document
function GetResult(url){
 var showmov = null;
 if(window.XMLHttpRequest){ //IE7, Mozilla ,Firefox 等浏览器内置该对象
 
   showmov = new XMLHttpRequest();
  
 }else if(window.ActiveXObject){ //IE6、IE5
 
   try{ showmov = new ActiveXObject("Msxml2.XMLHTTP");} catch (e){ ; }
  
   if( showmov == null) try { showmov = new ActiveXObject("Microsoft.XMLHTTP");} catch (e){; }
  
 }
 showmov.open("post",url,false);
 showmov.send();
 var strResult = showmov.responseText;
 showmov = null
 return strResult;
}