1	/*!
2	 * jQuery UI Effects Drop @VERSION
3	 *
4	 * Copyright 2012, AUTHORS.txt (http://jqueryui.com/about)
5	 * Dual licensed under the MIT or GPL Version 2 licenses.
6	 * http://jquery.org/license
7	 *
8	 * http://docs.jquery.com/UI/Effects/Drop
9	 *
10	 * Depends:
11	 *      jquery.effects.core.js
12	 */
13	(function( $, undefined ) {
14	
15	$.effects.drop = function(o) {
16	
17	        return this.queue(function() {
18	
19	                // Create element
20	                var el = $(this), props = ['position','top','bottom','left','right','opacity'];
21	
22	                // Set options
23	                var mode = $.effects.setMode(el, o.options.mode || 'hide'); // Set Mode
24	                var direction = o.options.direction || 'left'; // Default Direction
25	
26	                // Adjust
27	                $.effects.save(el, props); el.show(); // Save & Show
28	                $.effects.createWrapper(el); // Create Wrapper
29	                var ref = (direction == 'up' || direction == 'down') ? 'top' : 'left';
30	                var motion = (direction == 'up' || direction == 'left') ? 'pos' : 'neg';
31	                var distance = o.options.distance || (ref == 'top' ? el.outerHeight({margin:true}) / 2 : el.outerWidth({margin:true}) / 2);
32	                if (mode == 'show') el.css('opacity', 0).css(ref, motion == 'pos' ? -distance : distance); // Shift
33	
34	                // Animation
35	                var animation = {opacity: mode == 'show' ? 1 : 0};
36	                animation[ref] = (mode == 'show' ? (motion == 'pos' ? '+=' : '-=') : (motion == 'pos' ? '-=' : '+=')) + distance;
37	
38	                // Animate
39	                el.animate(animation, { queue: false, duration: o.duration, easing: o.options.easing, complete: function() {
40	                        if(mode == 'hide') el.hide(); // Hide
41	                        $.effects.restore(el, props); $.effects.removeWrapper(el); // Restore
42	                        if(o.callback) o.callback.apply(this, arguments); // Callback
43	                        el.dequeue();
44	                }});
45	
46	        });
47	
48	};
49	
50	})(jQuery);