genMenu = function(){
	
	$$('#nav1 li.menuitem').each(function(item,index){
		item.addEvent('mouseover',function(){
			subMenu = $('sub'+item.id);
			
			if (subMenu) {
				subMenu.setStyle('display','block');
				subMenu.setStyle('left','auto');
			}
		});
		item.addEvent('mouseout',function(){
			if (subMenu) {
				subMenu = $('sub'+item.id);
				subMenu.setStyle('display','none');
			}
		});
	});
}

window.onload=genMenu;