var ie=document.all;
var ff=(document.getElementById &&!ie); 
var w3=(!ie && !ff); 
var version=(parseInt(navigator.appVersion)); 


if ( ie ) document.write('<link rel="stylesheet" type="text/css" href="/cssjs/mainWrap_ie.css">');
if ( ff || w3 ) document.write('<link rel="stylesheet" type="text/css" href="/cssjs/mainWrap_w3.css">');