Hello room

I have an J2EE based application where ,my JSP embeds an applet displaying rates from NY stock exchange.This applet has many operational feature like displaying graphs ,show previous days quotes etc.Our client has an typical requiremnent, wherein he displays this applet on to his site.Site users viewing this applet and looking thru the live stock rates should not be able to exercise the applets feature like mentioned above.The applet when viewed by the site users should only be viewable and not operational.
To cut it short, he wants to restrict the users to only viewing and not use the other features of the applet.
We do not have the source code tot his applet as it is downloaded from some other authorized site.

Is there an feature, where we can have an transparent layer betwen the applet and the user which will restrict alluser activities.
Any suggestions are welcome.