Barra do google com fundo branco

<!-- Search Google -->
<center>
<form method="get" action="http://www.google.com.br/custom" target="google_window">
    <table height="68" bgcolor="#ffffff">
      <tr>
        <td nowrap="nowrap" valign="middle" align="left" height="32"> <a href="http://www.google.com/" target="_blank">
          <img src="http://www.google.com/logos/Logo_25wht.gif" border="0" alt="Google" align="middle"></img></a>
          <input type="text" name="q" size="31" maxlength="255" value=""></input>
<input type="submit" name="sa" value="Pesquisar"></input>
<input type="hidden" name="client" value="pub-1739532624858554"></input>
<input type="hidden" name="forid" value="1"></input>
<input type="hidden" name="ie" value="ISO-8859-1"></input>
<input type="hidden" name="oe" value="ISO-8859-1"></input>
<input type="hidden" name="cof" value="GALT:#008000;GL:1;DIV:#336699;VLC:663399;AH:center;BGC:FFFFFF;LBGC:336699;ALC:0000FF;LC:0000FF;T:000000;GFNT:0000FF;GIMP:0000FF;FORID:1;"></input>
<input type="hidden" name="hl" value="pt"></input>
</td></tr></table>
</form>
</center>
<!-- Search Google -->