// Navigation

$(document).ready(function() {

    function mainmenu() {

        $("ul.nav_links").css({ display: "none" });

        $(" #nav_main_links li").hover(function() {
            $(this).find("ul.nav_links").css({ visibility: "visible", display: "none" }).show(400);
        }, function() {
            $(this).find("ul.nav_links").css({ visibility: "hidden" });
        });
    }

    $(document).ready(function() {
        mainmenu();
    });

});