Hi

Fist of all...you cannot get any security with javascript....it's just for managing the web pages....gettins info...but not for more....

algo from applets....those can be downloaded and decompiled ( DJ java decompiler )

I'll suguest you'll make somo dinamical page..usgin jsp for example where you can log user activitiy and at the end of the session ( before the user closes the explorer...or goes somewhere else) show him what he has done...

It'll be a god aproach to site monitoring...and also'll increase your programming skills