function ulubione(){
    //IE
    if ((navigator.userAgent.toLowerCase().indexOf('msie') > 0) && window.external) {
        window.external.AddFavorite('http://www.piotrowski-okna.pl', document.title);
    }
    //FF || OPERA
    else
        if (window.sidebar) {
            window.sidebar.addPanel(document.title, 'http://www.piotrowski-okna.pl', "");
        }
    //INNE
    else {
        alert('Nacisnij ctrl+d');
    }
    return false;
}
$(window).load(function(){
    $("#main_menu > li").bind("mouseenter",function(){
        $(this).children('ul').slideDown('slow');
    }).bind("mouseleave",function(){
        $(this).children('ul').slideUp('slow');
    });
});