Hi

i am trying to align the 2 images on top frame and main frame page but facing problem
when preview it in Firefox browser, In IE browser, it's no problem.

please take a look below:

http://www.big-byte.biz/test/frame-index.html


Please advise me how to fix the alignment issue.

Align how and what are the issues? I see two huge images and they look the same in IE and FF.

I'd say it's probably the scrollbar in the content frame pushing that frame over.
I think you'll find a general consensus that FRAMES are bad . . . very very bad.

Try to learn some simple CSS or use a table layout instead.

Oh. Didn't notice that.

There's also a difference in width in both images:
top.jpg = 768px
main.jpg = 775px

BTW, I don't see why using JPEG's for flat coloured backgrounds like that. In this case, GIF would be a better choice.
Besides, you don't even need to use images, when you can use CSS to set the background color of elements.