/* ---------------------------- */
/* SHOW-HIDE Layer				*/
/* ---------------------------- */
var active_layer;
var just_activated = false;
function showlayer(layer){
	var myLayer=document.getElementById(layer);
	if(myLayer.style.display=="none" || myLayer.style.display==""){
		if(active_layer)
			active_layer.style.display = "none";
		just_activated = true;
		myLayer.style.display="block";
		active_layer = myLayer;
	} 
	else { 
		myLayer.style.display="none";
		}
	
}
function hideActiveLayer()
{
	if(active_layer)
	{
		if(!just_activated)
		{
			active_layer.style.display = "none";
			delete active_layer;
		}
		else
			just_activated = false;
	}
}
function hidelayer(layer){
	var myLayer=document.getElementById(layer);
	
	myLayer.style.display="none";
}

function undisplay(layer)
{
	layer.style.display="none";
}