$(document).ready(function () {
    function addMega() {
        $(this).addClass("hovering");
    }
    function removeMega() {
        $(this).removeClass("hovering");
        $(this).find("sub").hide();
    }

    var megaConfig = {
        interval: 100,
        sensitivity: 10,
        over: addMega,
        timeout: 100,
        out: removeMega
    };

    $("li.mega").hoverIntent(megaConfig);
});