.js File caching behavior on different browsers

Hi all

Might be an insanly stupid question but, is there a simple way to force 
the reload of JScript code for LivePages via a server issued directive?

I ask because Firefox seems to cling to the JScript files until the user
forces it to forget them with 'Clear Private Data', which leads to ugly 
mismatches between server and client side code.

Thxs, Werner