var timeout	= 500;
var closetimer	= 0;
var ddmenuitem	= 0;

function mopenclick(id) {
	mcancelclosetime();
	if ((ddmenuitem) && (id != prevID)) {
		ddmenuitem.style.visibility = 'hidden';
	}
	ddmenuitem = document.getElementById(id);
	if  (ddmenuitem.style.visibility == 'visible') {
		ddmenuitem.style.visibility = 'hidden';
	} else {
		ddmenuitem.style.visibility = 'visible';
	}
	prevID = id;
}

function mopenhover(id) {	
	mcancelclosetime();
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
	ddmenuitem = document.getElementById(id);
	ddmenuitem.style.visibility = 'visible';
	prevID = id;
}

function mclose() {
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
}

function mclosetime() {
	closetimer = window.setTimeout(mclose, timeout);
}

function mcancelclosetime() {
	if(closetimer) {
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}

//document.onclick = mclose;