Sorry? I don't understand
Although Microsoft sometimes make their own versions of things and add their own features which are not standard and therefore will not work with all browsers, code can be written so that it display properly on all browsers, either by not using the non-standard functions, or by the script recognising what browser is being used and executing the appropriate code.
Are you looking for a dynamic html popup menu script that runs in Netscape navigator and Internet explorer? If so, look at http://www.bosrup.com/web/overlib/
which runs with version 4 browsers and up.
I hope this answers your questions. If it doesn't please rephrase it and I'll try and help you out.