var CurDiv = "empty";
var isIE	= false;
var isOther = false;
var isNS4	= false;
var isNS6	= false;

if(document.getElementById)
{
	if(!document.all)	{isNS6=true;}
	if(document.all)	{isIE=true;}
}
else
{
	if(document.layers)	{isNS4=true;}
	else				{isOther=true;}
}
	
function aLs(layerID)
{
	var returnLayer;
	if(isIE)	{returnLayer = eval("document.all." + layerID + ".style");}
	if(isNS6)	{returnLayer = eval("document.getElementById('" + layerID + "').style");}
	if(isNS4)	{returnLayer = eval("document." + layerID);}
	if(isOther)
	{
		returnLayer = "null";
		alert("-[Error]-\nDue to your browser you will probably not\nbe able to view all of the following page\nas it was designed to be viewed.");
	}
	
	return returnLayer;
}
	
	
function SetFeatureBlock(ID)
{
	if (CurDiv != "empty")	{aLs(CurDiv).display  = "none";}
	
	aLs(ID).display = "block";

	CurDiv = ID;
}