Tip & Tricks

Actual code
$(document).ready(function(){
 
 $('li.mainlevel').mousemove(function(){
 $(this).find('ul').slideDown();//you can give it a speed
  });
 $('li.mainlevel').mouseleave(function(){
 $(this).find('ul').slideUp("fast");
  });
 
});



To avoid no conflictvar j = jQuery.noConflict();   // define and replace object $ with j
j(document).ready(function(){
 
  j('li.mainlevel').mousemove(function(){
  j(this).find('ul').slideDown();//you can give it a speed
  });
  j('li.mainlevel').mouseleave(function(){
  j(this).find('ul').slideUp("fast");
  });
 
});