<!-- Simple Drop-Down Menu (sddm) from http://javascript-array.com/scripts/simple_drop_down_menu/   -->

var timeout         = 500;
var closetimer		= 0;
var ddmenuitem      = 0;
 
// open hidden layer
function mopen(id, parentElement) {	
	mcancelclosetime();
 
	// close open menu, if any
	if (ddmenuitem) 
		ddmenuitem.style.visibility = 'hidden';
	// get new layer and show it
	ddmenuitem = document.getElementById(id);
	ddmenuitem.style.top = parentElement.offsetTop + "px";
	ddmenuitem.style.left = parentElement.offsetLeft + parentElement.offsetWidth + "px";
	ddmenuitem.style.visibility = 'visible';
}

// close open menu, if any
function mclose() {
	if (ddmenuitem) 
		ddmenuitem.style.visibility = 'hidden';
}
 
// go close timer
function mclosetime() {
	closetimer = window.setTimeout(mclose, timeout);
}
 
// cancel close timer
function mcancelclosetime() {
	if(closetimer) 	{
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}
 
// close layer when click-out
document.onclick = mclose;