Passwords?

I have some field error checking going on ... and when a user (say) doesn't fill in a field correctly, my error page comes up telling them. They then must click on their browsers <back> button and make the changes. Now -- I have a password field, and when they click back, they are forced to re-enter their password -- this is annoying. My questions are: 1. Is there a way to make this stop happening? 2. Instead of the user clicking on their browsers <back> button, can I add a URL that provides the same functionality -- that will work in IE and Netscape? Thanks Jason