http://bniaulin.wordpress.com/2012/12/10/delay-the-hover-in-

(function($) {
var timer;

$(document).ready(function() {
    $('li.static.dynamic-children').unbind('mouseover').unbind('mouseout');
    $('li.static.dynamic-children').hover(function () {
        var li = $(this);

    li.css({ 'position': 'relative', 'z-index': '100' });
        li.find('ul.dynamic').css({ 'left': '-1px', 'top': '25px' });
    li.find('ul.dynamic').hide();
        timer = setTimeout(function () {
            li.find('ul.dynamic').show('fast');
        }, 1000);
    }, function () {
    clearTimeout(timer);
    var li = $(this);
        li.css({ 'position': 'absolute', 'z-index': '0' });
        li.find('ul.dynamic').css({ 'left': '-999em', 'top': '0px' });
    });
});

}(jQuery));