Dreamweaver or Frontpage Gurus HELP

When I go to a webpage and on that page there is a box from one side to another and fits the screen no matter what resolution the end user is running, how do I achieve this?

I have tryed for several days to make this work and I am about to pull my hair out when I know its got to be something simple.

whats the site?

Not just one site, its any site thats has graphics that fit the screen perfect from one side to the other.

Do you mean a table?

If in HTML you would type.

<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td>CONTENT OF THE TABLE AKA TABLE</td>
</tr>
</table>

This 100% insures it stays 100% of the screen!