$(function(){	
	var navSelector = "#nav ul li";/** define the main navigation selector **/
	
	jQuery(navSelector).hover(function(){/** build animated dropdown navigation **/
		jQuery(this).find('ul:first:hidden').css({visibility: "visible",display: "none"}).show("fast");
		},function(){
		jQuery(this).find('ul:first').css({visibility: "hidden", display:"none"});
		});
	});