$(function() {
    var config = {
        sensitivity: 3,  
        interval: 100,
        over: MouseOver,
        timeout: 500,
        out: MouseOut  
    };

    $("#navTop li").hoverIntent(config);
});

function MouseOver() {
    $("ul", this).show();
}

function MouseOut() {
    $("ul", this).hide();
}