frames in html

I am using 3 horizontal frames. Top and Bottom frames I have given no scrolling and the middle frame I have given auto scrolling.
The middle part it is showing some scroll for those pages also where the size of the page can be accomodate in that part.
Tell me how to stop the same from scrolling.

If I understand correctly, your middle frame is showing scrolling, but you think it shouldn't be because the page appears to fit?
If that is the case, there may be some invisible elements on the page that are making it larger than it seems. Do you possible have any height tags set in your tables, or empty <P> tags that could pushing the page to be larger.
That's about all I have as far as ideas. Good Luck.