$(window).load(function() {
	$('#slider').nivoslider();
});

//menu
$(document).ready(function(){
  
  $('li.mainlevel').mousemove(function(){
  $(this).find('ul').show("slow");//you can give it a speed
  });
  $('li.mainlevel').mouseleave(function(){
  $(this).find('ul').slideup("fast");
  });

});