https://launio.org/Scripts/App/htmlExpandable.js

1//showmore plugin
2(function ($){
3	var methods = {
4		init: function(options){
5			var opts = $.extend({}, $.fn.htmlexpandable.defaults, options);
6			
7			return this.each(function(){
8				var $this = $(this);
9				var $parent = $this.parent();
10				var scrollHeight = this.scrollHeight;
11				if (scrollHeight > opts.height){
12					$("<a>")
13						.addClass("show-more")
14						.insertAfter($this)
15						.html(opts.lang.showMore)
16						.click(function(){
17							var $a = $(this);
18							if ($a.hasClass("show-more"))
19								$this.animate({
20	       							'maxHeight': scrollHeight
21	    						}, function(){
22	    							$a.removeClass("show-more").addClass("show-less").html(opts.lang.showLess);
23	    						});					
24	    					else if ($a.hasClass("show-less"))
25	    						$this.animate({
26	       							'maxHeight': opts.height
27	    						}, function(){
28	    							$a.removeClass("show-less").addClass("show-more").html(opts.lang.showMore);
29	    						});			
30						});
31				}
32			});
33		}
34	};
35	
36	$.fn.htmlexpandable = function(method){
37		if (methods[method])
38			return methods[method].apply(this, Array.prototype.slice(arguments, 1));
39		else if ( typeof method === 'object' || !method)
40			return methods.init.apply(this, arguments);
41		else
42			$.error('Method ' + method + ' does not exists');
43	}
44	
45	$.fn.htmlexpandable.defaults = {
46		height: 150,
47		lang: {
48			showMore: "Show more",
49			showLess: "Show less"
50		}
51	}
52	
53}(jQuery));