There is many different ways:
http://easyframework.com/demo_popup.php A sure way is:http://www.web2py.com/plugins/static/web2py.plugin.*mmodal*.w2p <http://www.google.com/url?sa=D&q=http://www.web2py.com/plugins/static/web2py.plugin.mmodal.w2p>
read more on: http://groups.google.com/group/web2py/browse_thread/thread/809bf7eb5072651f/90ecd2c59b3dacc6?lnk=gst&q=mmodal#90ecd2c59b3dacc6 Kenneth