ASP.NET(Speech Plug-In)

Question

Dear all, I have developed a speech web application using Speech SDK(SASDK) with VisualStudio.NET on Win2003 environment. Users can access this speech web application by using SALT enabled browser i.e. the browser must have installed with Speech plug-in. some of the users access this speech web application without having the Speech plug-in installed in their system. In that case I have to give the option to the user to run the setup file(one like in yahoo messenger) i.e. setup.exe which is in the server by using client-side Java Script. could anyone help on this. Regards, Sateesh