var currentLayerarlist ="arlist1";
var currentDivarlist = "y1"; 
function showLayerarlist(obj,div){
	if(currentLayerarlist!=obj.id) { 
	showItarlist(currentLayerarlist,currentDivarlist,false); 
	currentLayerarlist = obj.id; 
	currentDivarlist = div;
	showItarlist(currentLayerarlist,currentDivarlist,true); 
	}
}
function showItarlist(o,d,mode){
	var obj = document.getElementById(o);
	var div = document.getElementById(d); 
	obj.className = mode?"active2":"inactive2";
	div.style.display = mode?"block":"none";
}