I am trying to validate some code, and I keep getting this error can someone help?

Here is the code:

<BODY BGCOLOR="#FFFFFF" ONLOAD="preloadImages();" TOPMARGIN="0" MARGINHEIGHT="0" LEFTMARGIN="0" MARGINWIDTH="0" LINK="#003366" VLINK="#660066" BACKGROUND="images/bkgd.gif">

Here are the errors I am getting from a valdating prg:

Error: unsupported attribute "marginheight" for tag <body>
Error: unsupported attribute "topmargin" for tag <body>

Can someone help?