Original code:

<script type="text/javascript">

   var uri=window.location.href;

document.write("<img src='http://api.qrserver.com/v1/create-qr-code/?data="+encodeURI(uri)+"&size=150x150'/>");

</script>



Google code:

<script type="text/javascript">

   var uri=window.location.href;

document.write("<img src='https://chart.googleapis.com/chart?chs=150x150&cht=qr&chl="+encodeURI(uri)'/>");

</script>