/**
 * @author andreas
 */
// getElementsByClassName = function (className, tag, elm)

function init_menus(){
	var menuItemContainers = getElementsByClassName("menuItemContainer");
	for(var i=0; i<menuItemContainers.length; i++){
		var subMenus = getElementsByClassName("sub_menu", "div", menuItemContainers[i]);
		if(subMenus[0]){
			menuItemContainers[i].subMenu = subMenus[0];
			menuItemContainers[i].onmouseover = function(){
				this.subMenu.style.visibility="visible";	
			}
			menuItemContainers[i].onmouseout = function(){
				this.subMenu.style.visibility="hidden";	
			}
		}
	}
}