var y1 = -200; 
(document.getElementById) ? dom = true : dom = false;

function placeIt() {
    
  /*alert(document.getElementById("layer1").style.top);
  alert(window.pageYOffset);
  alert(window.innerHeight);
  alert(window.innerHeight-y1);
  alert(window.pageYOffset + (window.innerHeight - (window.innerHeight-y1)));
  */
  //if(document.getElementById("layer1").style.top=='-130px' || document.getElementById("layer1").style.top=='250px'){alert(window.pageYOffset);}
    //if(window.pageYOffset>=20 && window.pageYOffset <=400)    {
document.getElementById("layer1").style.top = window.pageYOffset + (window.innerHeight - (window.innerHeight-y1)) + "px";
    //}  
  /* /layer1
  if (dom && !document.all){document.getElementById("layer1").style.top = window.pageYOffset + (window.innerHeight - (window.innerHeight-y1))}		
  if (document.layers) {document.layers["layer1"].top = window.pageYOffset + (window.innerHeight - (window.innerHeight-y1))}
  if (document.all) {document.all["layer1"].style.top = document.body.scrollTop + (document.body.clientHeight - (document.body.clientHeight-y1));}
  */
  //layer2
  /*
  if (dom && !document.all){document.getElementById("layer2").style.top = window.pageYOffset + (window.innerHeight - (window.innerHeight))}		
  if (document.layers) {document.layers["layer2"].top = window.pageYOffset + (window.innerHeight - (window.innerHeight))}
  if (document.all) {document.all["layer2"].style.top = document.body.scrollTop + (document.body.clientHeight - (document.body.clientHeight));}  
  */
  window.setTimeout("placeIt()", 10); }