var requrl = '404;http://soft.cooldoo.com:80/soft/1781.html'; var start = requrl.lastIndexOf("/") + 1; var end = requrl.indexOf("?"); requrl=requrl.substring(start,end); if(requrl.indexOf("404") == 0) document.location="http://ent.sogua.com"; var curl = document.location.href.substring(7); var tPos = curl.indexOf("/"); if(tPos > -1) curl = curl.substring(0, tPos); if(requrl == curl + ".asp") document.location="http://ent.sogua.com";