Try using this: <DIV STYLE="position:absolute; top:50px; left:40px; width:400px; height:300px; background-color:blue;"></DIV> then place the button in between the div tags.
You can also use that style tag to place it in relavence to the place it literally appears. So for example if you put it in a 200x200 table on your page then use STYLE="position:absolute; top:50px; left:40px;" it would appear 50 pixels from the top and 40 from the left in that table. Hope this helps.