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The full height of the form on your Contact page (http://www.ballon-verdreher.de/kontaktformular.html) is not being displayed because the div (division) within which it is enclosed is too short in height. My tests have indicated that expanding the height of that div from 621px to about 850px should resolve the problem. You would also want to increase the height of the image used as the form's background from 810px to about 1020px. The aforementioned changes would result in the bottom of the form being displayed as follows: