Below is the code to load jQuery from all 3 CDNs:
Code to load jQuery Framework from Google CDN
<script type="text/javascript"
src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js">
</script>
Code to load jQuery Framework from Microsoft CDN
<script type="text/javascript"
src="http://ajax.microsoft.com/ajax/jquery/jquery-1.9.1.min.js">
</script>
Code to load jQuery Framework from jQuery Site(EdgeCast CDN)
<script type="text/javascript"
src="http://code.jquery.com/jquery-1.9.1.min.js">
</script>