$(document).ready(function() {

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

    function removeMega(){
        $(this).removeClass("hovering");
    }
    
    var megaConfig = {
        interval: 50,
        sensitivity: 4,
        over: addMega,
        timeout: 50,
        out: removeMega
    };

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