If what you are looking for is the ability to execute code on the server then
you should probably look at Servlet/JSPs or some other mechanism for generating server side code (CGI, PERL,
J2EE application servers, ASP, TCL, JHTML etc etc).
If it is really Javascript that you want to execute, I think a previous version of the BroadVision Application server once had a Javascript engine in the back end, but as to where they got it from I can't remember. It was slow as a dog anyways.
Help much?
Dave