Applet aren't necessary, at least ActiveX Controls can be used instead. The application was developed by another company and is now in service. What the client ask to do is finger out what the problem is and provides a simple solution. So it's unacceptable to make some change in the application architecture.

The applets' functionality is norraw, however they provide strong capability and flexibility of displaying data. Briefly speaking, the problem
is: Both Netscape and IE with http are ok; Netscape with https ok; but IE with https not.
I tried to use jre1.3 plug-in, however no help.
I now really run out of idea. Any other hints? Thanks, jabber.