$(document).ready(function () {

    $("ul#topnav li.liserv").hover(function () { //Hover over event on list item
        //$(this).css({ 'background': '#1376c9 url(topnav_active.gif) repeat-x' }); //Add background color and image on hovered list item
        $(this).find("span").show(); //Show the subnav
    }, function () { //on hover out...
        //$(this).css({ 'background': 'none' }); //Ditch the background
        $(this).find("span").hide(); //Hide the subnav
    });

});