Dropdown menu that animates

gistfile1.txt

				var lastOpenItem = null;
				$(".nav li.HasSubMenu ul").each(function(i, el){
					$(this).data('originalHeight', $(this).height());
					$(this).css('width', $(this).width());
				})
				$(".nav li.HasSubMenu ul").css({height: '0px'});
				$(".nav li.HasSubMenu").hover(
					function () {
						$(this).addClass("hover");
						$(this).children('ul').eq(0)
							.css({visibility: 'visible', zIndex: 1000})
							.stop()
							.animate({
						  	  height: $(this).children('ul').eq(0).data('originalHeight') + 'px'
							  }, {queue:false, duration:500, easing: 'easeOutSine'});
					
					}, function() {
						lastOpenItem = $(this);
						$(this).delay(200)
							.removeClass("hover")
							.children('ul').eq(0)
							.css({zIndex: 999})
							.stop()
							.animate({
								height: '0px'
								},{
									queue:false, 
									duration:300, 
									easing: 'easeInSine',
									complete: function() {
										$(this).css({visibility: 'hidden'});
									}
								}
							);
					
					}
				);