window.addEvent('domready', add_events);

function add_events()
{
   // $('butonShowSubCat').addEvent('click', showSubNav.bindWithEvent() );
}

function showSubNav(event1)
{
    new Event(event1).preventDefault();
    var navCat = $('navCat');
    navCat.getElements('li').each(function(cat) {
        if(cat.className != "on")
            cat.className = "on";
        else
            cat.className = "";
    });
}