var megaConfig = {
    interval: 100,
    sensitivity: 4,
    over: addMega,
    timeout: 500,
    out: removeMega
};

function addMega() {
    $(this).addClass("hovering");
}

function removeMega() {
    $(this).removeClass("hovering");
}

$(document).ready(function () {
    $("li.mega").hoverIntent(megaConfig);
});