function mainmenu() {
    $(" #toplinkdd ul ").css({ display: "none" }); // Opera Fix
    $(" #toplinkdd li").hover(function() 
    {
        $(this).find('ul:first').css({ visibility: "visible", display: "none" }).slideDown("slow");
    }, function() {
        $(this).find('ul:first').css({ visibility: "hidden" });
    });
}



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