Reading Script Tag testing

Thoughts based on http://stackoverflow.com/questions/2669690/why-does-google-prepend-while1-to-their-json-responses

HTML

<script id='test' src="http://headwayapp.co/assets/js/widget/app-938859d308.js" type="text/javascript">
    $(function() { $('var').append("JavaScript inside the script tag was executed.<br />"); });
</script>
<var></var>

JavaScript

$('var').append("JSRender was "+($.fn.render ? "" : "NOT")+" loaded.<br />");
$('var').append("Script tag reads as being "+($("#test").html() === "" ? "" : "NOT")+" empty.<br />");