$(document).ready(function() {
    function megaHoverOver() {
        $(this).find(".sub").stop().fadeTo('fast', 1).show();
    }

    function megaHoverOut() {
        $(this).find(".sub").stop().fadeTo('fast', 0, function() {
            $(this).hide();
        });
    }

    var config = {
        sensitivity: 2, // number = sensitivity threshold (must be 1 or higher)    
        interval: 1, // number = milliseconds for onMouseOver polling interval    
        over: megaHoverOver, // function = onMouseOver callback (REQUIRED)    
        timeout: 500, // number = milliseconds delay before onMouseOut    
        out: megaHoverOut // function = onMouseOut callback (REQUIRED)    
    };
    $("ul.menu li").hoverIntent(config);
});