Call dll from Javascript

Question

I have created dll for some Logic and I am using that dll in my Web application.

In IE , I am doing by ActiveX Control but in Non IE browsers ActiveX control is not working. In Other browsers I have to use Plugins or Extensions.

I can open IE from Chrome and Firefox through IE tab Extension, but that is not good solution. 

 

So how to call that dll in other browsers like Chrome and Firefox (not by adding dll reference). I have to call that dll  from javascript.

 

Plz Help