problem with callback from C++ plugins to javascript for ns6

[MacTan]

Hi,

    I managed to do a callback from plugin to javascript using NPN_GetURL()
if the call is initiated from the javascript.
    e.g. my page has a test button, pressing it will call the test()
function in the plugin. Within that function, I can call test2() function
implemented in the javascript.

 The problem is that my plugin will recieve events and I want to fire the
events to the javascript. When I recieved a event, I will call test2().
netscape 6 will hang.

    why.

    Any help. thanks