window.addEvent('domready', function(){
    if($('navigationMenu'))$('navigationMenu').getElements('li').addEvents({
        'mouseenter': function(){showMenu(this)},
        'mouseleave': function(){hideMenu(this)}
    });
});

function showMenu(element){
    var ul=$(element).getElements('ul')[0];
    if(ul)ul.style.display="block";
}

function hideMenu(element){
    var ul=$(element).getElements('ul')[0];
    if(ul)ul.style.display="none";
}