Firefox 3.0 Create problems with Form Submission to SSL

We had an script which submit an form using javascript to a HTTPS:// page (The First page was HTTPS:// it self )
We noticed in firefox this javascript will fail always however it works great in IE6 and IE7

Removing page and form target from https:// (SSL) make the script works

Lastly I removed the FORM,changed target script to GET from POST and use a simple redirection instead of form