addEvent(window, 'load', wireMenuItems);

function wireMenuItems()
{
	if (!document.getElementsByTagName) return false;
	var items = document.getElementsByTagName('li');
	for (var i=0; i < items.length; i++)
	{
		if (items[i].className.match('ParentMenuItem'))
		{
			addEvent(items[i], 'mouseover', onMouseOverMenu);
			addEvent(items[i], 'mouseout', onMouseOutMenu);
		}
	}
}

function onMouseOverMenu()
{
	uList = this.getElementsByTagName('ul')[0];
	uList.style.visibility = 'visible';
}
function onMouseOutMenu()
{
	uList = this.getElementsByTagName('ul')[0];
	uList.style.visibility = 'hidden';
}