function mainmenu(){
$(" .nav-horiz ul ").css({display: "none"}); // Opera Fix
$(" .nav-horiz li ").hover(function(){
$(this).find('ul:first:hidden').css({visibility: "visible", display: "none"}).fadeIn(400);
},function(){
$(this).find('ul:first').fadeOut(100).css({visibility: "hidden", display: "block"});
});
}

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