iFrame in middle of page

[Bob]

Hi Folks!

I would like to have a page with an iFrame in the middle.

The "width" of the Iframe would be about 100% but the height would be
about 70%, like this:

"top" variable width, about 20%

middle the iFrame, about 70%

"bottom" about 10%

The iFrame will scroll as it will always be too large to fit.

The top should be variable, sometimes it will only take up 5%, other
times it will be 25%.

Can anybody give me this code....does anyone have an example page?

Thanks-In-Advance