//preload menuImages and swap function
	function swap(id, suffix){
		document.getElementById("menuImage-" + id).src = "/images/menu" + id + "_" + suffix + ".png";	
	}
	
	function toggle(id){
		if (document.getElementById("menu" + id + "-0").style.display == "none"){
			todo = "open";
		}
		else{
			todo = "close";
		}
		
		//close all
		document.getElementById("menu1-0").style.display = "none";
		document.getElementById("menu1-1").style.display = "none";
		document.getElementById("menu1-2").style.display = "none";
		document.getElementById("menu2-0").style.display = "none";
		document.getElementById("menu2-1").style.display = "none";
		document.getElementById("menu4-0").style.display = "none";
		document.getElementById("menu4-1").style.display = "none";
		document.getElementById("menu5-0").style.display = "none";
		document.getElementById("menu5-1").style.display = "none";
			
		if (todo == "open"){
			document.getElementById("menu" + id + "-0").style.display = "";
			document.getElementById("menu" + id + "-1").style.display = "";
			if (document.getElementById("menu" + id + "-2")){
				document.getElementById("menu" + id + "-2").style.display = "";
			}
		}
		else{
			document.getElementById("menu" + id + "-0").style.display = "none";
			document.getElementById("menu" + id + "-1").style.display = "none";
			if (document.getElementById("menu" + id + "-2")){
				document.getElementById("menu" + id + "-2").style.display = "none";
			}
		}
		
	}