Not about PHP, HTML question

Hi, I know this is a PHP mail list, but I have this enoying problem with simple HTML. In my body a have: <BODY bgcolor = "#7e8990" marginwidth="0" marginheight="0" topmargin="0" leftmargin="35"> The problem I experience is that 100% is acully less then "visible" 100%, my design is based on a table (no frames) with height 100%. The first time I load the page it's a about 10px in the bottom that's empty and if I update the page it shows correctly (the empty space in the bottom disappers). Its strange but its seems like 100% is less then 100% the second time. Is there a way to do this in PHP or some another langues so 100% is 100% of the visible browser size. Thanks //jocke