var y1 = 70;   
var advmax = 2000;

(document.getElementById) ? dom = true : dom = false;

function hideAdvL() {
  if (!document.getElementById("advlayer")) return 0;
  if (dom) {document.getElementById("advlayer").style.visibility='hidden';
    document.getElementById("advlayer").style.height='0px';
  document.documentElement.scrollTop = 0;

}
}

function showAdvL() {
  if (!document.getElementById("advlayer")) return 0;
  if (dom) {document.getElementById("advlayer").style.visibility='visible';}
}

function placeAdvL() {
  if (!document.getElementById("advlayer")) return 0;
  if (document.getElementById("advlayer").style.visibility=='hidden') return 0;

  
  if (dom && !document.all) {
  if (window.pageYOffset<advmax) 
  {
   advtop = window.pageYOffset + (window.innerHeight 
- (window.innerHeight-y1));
  document.getElementById("advlayer").style.top = advtop + "px"; 
  }
}

  if (document.all) {
if (document.documentElement.scrollTop<advmax)
{
advtop = document.documentElement.scrollTop + (document.documentElement.clientHeight - (document.documentElement.clientHeight-y1));
document.all["advlayer"].style.top = advtop + "px";
}
 }

  window.setTimeout("placeAdvL()", 10); }