I believe bustabit and all the clones use javascript for the autobet system, so I'm sure the OP would have no problems with any other site.

I will however point out that bustabit/bustadice uses an extensive sandbox system, that makes it exceedingly hard to write malicious scripts (other than the obvious way of betting in a way you didn't want) and executes inside an iframe that doesn't have ability to interact with the page except through an explicit interface.  AFAIK none of the clones or other casinos do this, so you need to be a lot more careful when executing scripts as it's pretty easy for them to do stuff like inject into the page an phish you and other nasty things like that.