$(document).ready(function () {

    $("ul#topnav li").hover(function () { //Hover over event on list item
        $(this).css({ 'background': '#c52720' }); //Add background color + image on hovered list item
        $(this).find("span").show(); //Show the subnav
    }, function () { //on hover out...
        $(this).find("span").hide(); //Hide the subnav
    });

});