I have quiestion about chesking plug-in by browser. I want to make site where will be some Viewpoint technology stuff. But if user will not want to install plugin pages which are using viewpoint technology will be changed to page without viewpoint technolgy. But I want make it automaticly, no with woting, if not instaled no problem, but when instaled new ffeatures are shown. Is there any way how to do it? By JAvaScript or PHP? thnx zwadar