We have made three solutions to this problem. Two of them you already know. The one ist using Netscape or Firefox and .monitor and the other is using remote front panel.
Your third solution uses a Java applet. When the document will be opened we download a Java applet and run it. Over a properitary protokoll we are transfering the data and commands between the client (the browser) and the server (the LV app). You can optimize the protocol for the amount of data to transfer.
Waldemar
Using 7.1.1, 8.5.1, 8.6.1, 2009 on XP and RT
Don't forget to give Kudos to good answers and/or questions