var onlineurl=window.location.href;
    var fromurl=document.referrer;
    var timestamp =  new Date().getTime()+Math.random();
    var src = "http://im.china.seenoo.com/getchatinfo.aspx?act=urlonline&cid=100433&onlineurl="+encodeURIComponent(onlineurl)+"&fromurl="+encodeURIComponent(fromurl)+"&timestam="+timestamp;
    var js = document.createElement('script');
    js.src = src;
  function   window.onunload()   
  {   
  }