function moveIt(obj, mvTop, mvLeft) {
 obj.style.position = "absolute";
 obj.style.top = mvTop;
 obj.style.left = mvLeft;
 }
 
function show(layerRef){
	var blockElement = document.getElementById(layerRef);
	blockElement.style.visibility = "visible";
}
function hide(layerRef){
	var blockElement = document.getElementById(layerRef);
	blockElement.style.visibility = "hidden";
}