//one varible for each levelthat will be drilling down
var domLevel1 = 1;
var domLevel2 = null;
var domLevel3 = null;

function showMenu(level1,level2,level3) {
	if (domLevel1 != null){
		if (level2 == null) {domLevel1.visibility = "hidden";}
		if (domLevel2!= null) {
			if (level3 == null) {domLevel2.visibility = "hidden";}
			if (domLevel3 != null) {domLevel3.visibility = "hidden";}
		}
	}
	
	if (level2 == null) { objectID = 'topMenu' + level1; domLevel2 = null; }
	else{
		if (level3 == null) { objectID = 'topMenu' + level1 + '--' + level2; domLevel3 = null; }
		else { objectID = 'menu' + level1 + '--' + level2 + '--' + level3 }
	}
		
	var domStyle = findDOM(objectID,1);
	domStyle.visibility = "visible";
	if (level2 == null) {domLevel2 = domStyle;}
	else {
			if(level3 == null){domLevel2 = domStyle;}
			else { domLevel3 = domStyle; }
		}
	
}

function hideMenu(n){
	objectID = 'topMenu' + n;
	
	var domStyle = findDOM(objectID,1);
	domStyle.visibility = "hidden";
	
}