As i see you may not getting the jquery from the url, becasuse of the .dev domain. if possible can you check 404 erros in fiddler. alternative i suggest you to use the CDN to Serve the Jquery library.. with an Fallback to the local path.
<script type="text/javascript" src="//ajax.microsoft.com/ajax/jquery/jquery-1.7.2.min.js"></script>
<script type="text/javascript">
if (typeof jQuery == 'undefined') {
document.write(unescape("%3Cscript src='/js/jquery-1.4.2.min.js' type='text/javascript'%3E%3C/script%3E")); // change the Local path of the Jquery library
}
</script>