There is no working javascript full node. I believe the future of bitcoin is brighter if there are many independent implementations of bitcoin running as full nodes.
I want bitcoin running in a browser because browsers work on every platform and can bring bitcoin to more people. Also keep in mind that reddit is primarily a website, to using javascript is a pretty appropriate first choice of language for bitcoin stuff.
Can you do serious crypto in C? Only if you know what you're doing and don't screw up. Same goes for javascript.
I want bitcoin running in a browser because browsers work on every platform and can bring bitcoin to more people. Also keep in mind that reddit is primarily a website, to using javascript is a pretty appropriate first choice of language for bitcoin stuff.
Can you do serious crypto in C? Only if you know what you're doing and don't screw up. Same goes for javascript.