Language for web game development

I've been making arcade-style flash/java games long enough I've started to make a living off of it, despite not knowing alot about what I'm actually doing coding-wise.
I've pretty much been using java the most to make games as it seems the more mature of the two and has tons more advantages over flash.
Now I'm thinking of starting a commercial online game but I'm wondering if there's any language better than java to do this.
Is there any better language that can be used to make games, compile them and embed them into a web-page(crucial)?

ActionScript is a joke
A joke it may be, but as a dynamic language, ActionScript is far superior to ECMAscript.