JavaScript: Falling back to a local version of AngularJS if the CDN version fails to load

Load local AngularJS if CDN fails

<!-- attempt to load AngularJS from CDN -->	
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.0.6/angular.min.js"></script>
		
<!-- if AngularJS fails to load fallback a local version -->
<script>window.angular || document.write('<script src="assets/js/angular.min.js"><\/script>');</script>

<!-- jQuery Ver. -->	
<script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script type="text/javascript">
  window.jQuery || document.write('<script src="../components/jquery/dist/jquery.min.js"><\/script>')
</script>