Ajax 超时检查脚本

代码如下:[removed] function Ajax(){ var xhr; if(window.XMLHttpRequest){ xhr=new XMLHttpRequest(); }else{ try{xhr=new ActiveXObject(“MSXML2.XMLHTTP.6.0”);}catch(e){} try{xhr=new ActiveXObject(“MSXML2.XMLHTTP”);}catch(e){} } if(!xhr) return; this.Xhr=xhr; //用属性存储XMLHttpRequest对象的实例 }