function addLoadEvent(func) {
	var oldonload = window.onload;
	if (typeof window.onload != 'function') {
		window.onload = func;
	} else {
		window.onload = function() {
			oldonload();
			func();
		}
	}
}

function menuboxon() {
	var menubox = document.getElementById('expandedmenu');
	menubox.style.display = 'block';
}

function menuboxoff() {
	var menubox = document.getElementById('expandedmenu');
	menubox.style.display = 'none';
}



function showmenu() {
	if (!document.getElementById('modnav')) return false;
	var moduleprompt = document.getElementById('modnav');
	var menubox = document.getElementById('expandedmenu');
	menuboxoff();
	var modulenav = document.getElementById('modnav');
	var links = modulenav.getElementsByTagName("a");
	for (var i=0; i<links.length; i++) {
		var linkclass = links[i].className;
		if (!linkclass) return false;
		//alert (linkclass);
		links[i].onclick = function() {
			if (menubox.style.display != 'block') {
				menuboxon();
				moduleprompt.className+=" expanded";
			}
			else {
				menuboxoff();
				moduleprompt.className = moduleprompt.className.replace(" expanded","");
			}
		}
	}
}

addLoadEvent(showmenu);