Trapping of Function Keys F3,F5 etc

Hi

I am in urgent need to have an hint or solution how to Trap Function Keys. In my Project we are displaying our content in Flash in a Browser.

Now we need to disable the functions F3 F5 and others like ALT+TAB, ALT+F4, but unable to achieve success.

Is ther a way.

On the net even I read that ASNative functions are helpful and did not find any help. Could any one please help us out.

We will be very grateful of you.

Thanks & Rgds
Piyush