you could just enclose your entire page code within your form tags, ie:
<body><form....>
[ page code ]
</form></body>
that would give you the freedom to put the submit button where ever you wanted. I can't see what could be gained by trying to accomplish what you mentioned above
this is Javascript issue !
anyway, I think you could do this by using a normal bottun any where in your page and add an OnClick event with javascript's function submit()
something like that :