reference errors with Masonry javascript grid layout lib. Any ideas why?

Hello experts,

Please reference code below:

<html>
<head>
<title>Test: blocks with dynamic heights</title>
<meta charset="ISO-8859-1" />
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- http://masonry.desandro.com/ -->
<link rel="stylesheet" href="https://ajax.googleapis.com/ajax/libs/jquerymobile/1.4.5/jquery.mobile.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquerymobile/1.4.5/jquery.mobile.min.js"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/masonry/3.3.0/masonry.pkgd.min.js"></script>
<script>
var container = $('#galleryContainer');
//initialize
$container.masonry({
columnWidth: 200,
itemSelector: '.item'
});
</script>
<style>
.imgContainer{ float:left; padding: 5px; }
.footer{ clear:both; }
</style>
</head>
<body>
<!-- PAGE 1 begins -->
	<div data-role="page" id="gallery" data-theme="a">			
		<!-- CONTENT -->
		<div data-role="main">
			<div id='galleryContainer'>
				<div class='imgContainer'>
				<div><a href='#'><img src="#" style="background-color:blue;width:300px;height:300px"></a></div>
				</div>
				<div class='imgContainer'>
				<div><a href='#'><img src="#" style="background-color:yellow;width:300px;height:600px"></a></div>
				</div>
				<div class='imgContainer'>
				<div><a href='#'><img src="#" style="background-color:red;width:300px;height:600px"></a></div>
				</div>
			</div>
		</div>
		
		<!-- FOOTER -->
		<div data-role="footer" class="footer">
			<div >footer</div>
		</div>	
	</div>
<!-- PAGE 1 ENDS -->	
</body>

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I do see the container defined above, I am not sure why I am getting this error:
ReferenceError: $ is not defined
var container = $('#galleryContainer');

Also, I am seeing the error below:
TypeError: a is undefined
...s,document,function(a,b,c){!function(a){a.mobile={}}(a),function(a,b){function d.

any ideas why I am getting these errors?

Thank you for your help...

Regards,
epifanio67Asked:
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Rainer JeschorCommented:
Hi,
two issues:
1. You miss the script reference to jQuery. jQuery mobile needs additionally jQuery reference, therefore the error as the shortcut for jQuery "$" is not defined.
2. "$container.masonry"  should be just "container.masonry" (that error will come as soon as you add the jQuery reference)

Live sample:
http://jsbin.com/xobade/20/edit

HTH
Rainer

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epifanio67Author Commented:
Thank you Rainer....
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