LEFTMARGIN establish margins in MSIE.
MARGINWIDTH establish margins in Netscape. If you feel that you just have to have that extra half inch, these attributes can give it to you. These MSIE and Netscape extensions are mutually compatible: you can use all of them to catch both of those browsers.
This body tag:
<BODY TOPMARGIN=0 LEFTMARGIN=0 MARGINHEIGHT=0 MARGINWIDTH=0>
helps create zero (actually almost zero) margins in this page.
Don't confuse the use of
<BODY ...> with their uses in
frames. When you use frames, put
MARGINWIDTH in the
<FRAME ...> tag,