var IE4 = document.all; NS4 = document.layers; NS6 = document.getElementById;
function getStyle(id){
	return NS4 ? document[id] : NS6 ? document.getElementById(id).style : document.all[id].style;
	}
function hideDiv(id){
	var x = NS4 ? (document[id] != null) : NS6 ? (document.getElementById(id) != null) : (document.all[id] != null);
	if(x)
		getStyle(id).display = NS4 ? "none" : "none";}
function showDiv(id){getStyle(id).display = NS4 ? "inline" : "inline";}
function HideLayer(layer){hideDiv(layer);}
function ShowLayer(layer){showDiv(layer);}