var y1 = 20;   // change the # on the left to adjuct the Y co-ordinate
	(document.getElementById) ? dom = true : dom = false;

	function hideIt() {
	  if (dom) {document.getElementById("layer1").style.visibility='hidden';}
	}

	function showIt(t,l) {
	  if (dom) {
	  	document.getElementById("layer1").style.visibility='visible';
	  	document.getElementById("layer1").style.top = t + "px";
	  	document.getElementById("layer1").style.left = l + "px";
	  }
	}

	function getElementLeft(Elem) {
		var x = 0;
		var elm; 
		elm = document.getElementById(Elem);

		while (elm != null) {
		  x+= elm.offsetLeft;
		  elm = elm.offsetParent;
		}
		return x;
	}
	
	function getElementTop(Elem) {
		var y = 0;
		var elm;
		elm = document.getElementById(Elem);
				
		while (elm != null) {
		  y+= elm.offsetTop;
		  elm = elm.offsetParent;
		}
		return y;
	}