[9248]

Funny thing, most if not all 'client-side failover' strategies you might find through google or the likes won't work either.

This is because the loaded resource will 'fail' anywhere between x seconds up to minutes, or never! In the meantime the user just sees a blank page, or best case, some 80-90% page that keeps trying to load something...

I've experienced this myself a couple times. Most probably my ISP messed up some stuff taking down whole chunks of 'internet' :)

[romaniv]

The fact that browsers don't have any built-in mechanisms to load-balance resources it disappointing, but not surprising. Think about who are the main drivers of HTML specs. There is probably a way to implement such balancing manually, though. Either through loading parallel documents and exploiting cahcing or through using setTimeout and loading a different set of resources.