Add QR codes to each link

gistfile1.html

<!-- paste this into the head element of an HTML file to append QR codes to each link -->
<script src="http://code.jquery.com/jquery-1.11.2.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery.qrcode/1.0/jquery.qrcode.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
    $("a").each(function(idx, item){
    	var a = $(item);
    	var href=a.attr("href");
    	a.qrcode({
    		text: href,
    		width: 300,
    		height: 300,
    		render: "canvas"
    	});
    });
});
</script>
<style type="text/css">
canvas {
	width: 2cm;
	height: 2cm;
	margin-left: .2cm;
	margin-right: .2cm;
	margin-top: .2cm;
}
</style>