//menu
$(document).ready(function(){
   if($('li.mainlevel')!=null)
   {
	  $('li.mainlevel').mousemove(function(){
	  $(this).find('ul').slideDown();//you can give it a speed
	  });
	  $('li.mainlevel').mouseleave(function(){
	  $(this).find('ul').slideUp("fast");
	  });
	  
	  $('li.mainlevel_y').mousemove(function(){
	  $(this).find('ul').slideDown();//you can give it a speed
	  });
	  $('li.mainlevel_y').mouseleave(function(){
	  $(this).find('ul').slideUp("fast");
	  });
   }
});