<!--
	function changeLAYER(idName){
		if(idName == 'mapType'){
			if(document.all){
				document.all("first").style.visibility = "hidden";
				document.all("mapType").style.visibility = "inherit";
			}
			else if(document.getElementById){
				document.getElementById("first").style.visibility = "hidden";
				document.getElementById("mapType").style.visibility = "inherit";
			}
		}
		else{
			if(document.all){
				document.all("first").style.visibility = "inherit";
				document.all("mapType").style.visibility = "hidden";
			}
			else if(document.getElementById){
				document.getElementById("first").style.visibility = "inherit";
				document.getElementById("mapType").style.visibility = "hidden";
			}
		}
	}
//-->