[toward-py3k] rewrite to "except AnException as exc:" (part of #2711624)
The older form is not necessary since we dropped python 2.5 compability. This
will help Python 3.3 experimentation.
<div id="ajaxroot">
<div class="ajaxHtmlHead">
<script src="http://foo.js" type="text/javascript"> </script>
<link rel="stylesheet" type="text/css" media="all" href="qunit.css" />
</div>
<h1>Hello</h1>
</div>