// JavaScript Document

function show(whichId){
	var targetLayer="drop_"+whichId;
	for(var k=0;k<4;k++){
		var layers="drop_"+(k+1);
		if(layers==targetLayer){
			document.getElementById(layers).style.visibility="visible";
			document.getElementById("link_"+whichId).className="active";
		}else{
			document.getElementById(layers).style.visibility="hidden";
			
		}
	}
	
}
function showSub(layers){
	document.getElementById(layers).style.visibility="visible";
}
function hideSub(layers){
	document.getElementById(layers).style.visibility="hidden";
}
function hide(whichId){
	document.getElementById("drop_"+whichId).style.visibility="hidden";
	document.getElementById("link_"+whichId).className="";
}