By setting the leftmargin and topmargin properties of the BODY tag, you can change how much space is left on the top and left of the page. If you add the parameters like this:
<body leftmargin=0 topmargin=0>
That will eliminate the margins entirely. If you visit http://www.northcomp.com, you can see this in action if you view the page with IE 5.0. The stripe is a background image, but you will see that the text is all forced to the left edge of the page.
If you’re using Netscape, you have to use different parameters for this to work. In Netscape, you can create this tag for the same effect:
<body marginheight=0 marginwidth=0>
If you’re writing for both browsers, you can use this version of the tag, as well:
<body leftmargin=0 topmargin=0 marginheight=0 marginwidth=0>