How to be 3.0 browser compliant and still validate?

I was trying to help a web designer with his site and we are left with the
following errors:



Error at line 10:
   body bgcolor="#ffffff" marginwidth="0" marginheight="0" left
                                              there is no attribute
                                        "MARGINWIDTH" (explanation...)



Error at line 10:
   ffff" marginwidth="0" marginheight="0" leftmargin="0" topmar
                                              there is no attribute
                                        "MARGINHEIGHT" (explanation...)



Error at line 10:
   th="0" marginheight="0" leftmargin="0" topmargin="0" text="#
          there is no attribute "LEFTMARGIN"  (explanation...)



Error at line 10:
   dth="0" marginheight="0" leftmargin="0" topmargin="0" text="#000000" v
                          there is no attribute "TOPMARGIN"
(explanation...)



Error at line 13:
                <td height="90" background="./image/tile.jpg"><img border=
                                        there is no attribute
                                  "BACKGROUND" (explanation...)



Error at line 17:
   "100%" cellspacing="0" cellpadding="0" background="./image/grass.gif">
                         there is no attribute "BACKGROUND"
(explanation...)



Is there any way of keeping the current look and feel of this site working
in 3.0 browsers and still validate?  I don’t think I know a way, but if
anyone has suggestions?

Thanks

Kevin Berkheiser