function toggleMenu(btn){
	var open = false;
	
	var menu = btn.getElementsByTagName("ul")[0];
	if(menu.className=="mclosed"){
		open = true;
	}
	
	closeMenus();
	
	if(open){
		var links = menu.getElementsByTagName("li");
		var h = links.length * 30;
		menu.className="mopen";
		menu.style.height = h + "px";
	}
}

function closeMenus(){
	document.getElementById("contactform").className="closed"; //close contact menu
	var menus = document.getElementById("mainnav").getElementsByTagName("ul");
	var nummenus = menus.length;
	
	for(var x=0; x<nummenus; x++){
		menus[x].className = "mclosed";
		menus[x].style.height = "0px";
	}
}

function toggleContact(){
	var open = false;
	var form = document.getElementById("contactform");
	if (form.className == "closed"){
		open = true;
	}
	
	closeMenus();
	
	if(open){
		form.className = "open";
	}
}