function counter() {

    var cntlink = document.createElement("script");
    cntlink.setAttribute("src","./counter.php?referer=" + escape(top.document.referrer) + "&screenres=" + screen.width + "x" + screen.height + "&colordepth=" + screen.colorDepth);
    cntlink.setAttribute("type","text/javascript");
    document.getElementsByTagName("head").item(0).appendChild(cntlink);
  }
  

  window.onload=counter;