[jQuery] DDoS attack to Jquery can be effectively prevented by ...

....using a webserver that can do IP level throttling (Bandwidth and
Request Rate)
see this one,
http://litespeedtech.com/
http://litespeedtech.com/products/webserver/overview/
. it can also do throttling differently for dynamic and static content
requests.
We are using this web server and We successfully defeated couple of
DDoS attacks in the past.
Galen