$(document).ready(function() {
    $('li ul .menu-ul-sub').hide()
    
    function show() {
        $(this).children('.menu-ul-sub').slideDown('fast');
    }
    
    function hide() {
        $(this).children('.menu-ul-sub').slideUp('fast');
    }

    $('.menu-sub').hoverIntent({
        sensitivity: 1,     // number = sensitivity threshold (must be 1 or higher)
        interval: 50,       // number = milliseconds for onMouseOver polling interval
        over: show,         // function = onMouseOver callback (required)
        timeout: 200,       // number = milliseconds delay before onMouseOut
        out: hide           // function = onMouseOut callback (required)
    });
});