text box al centro

[bellacord]

tengo esta lineas de codigo....


<td align="center"><form style="margin:0" "action="accion.php" method="post">
<input type="text" name="searchword" class="inputbox" onBlur="if(this.value=='') this.value='<?php echo _SEARCH_BOX; ?>';" onFocus="if(this.value=='<?php echo _SEARCH_BOX; ?>') this.value='';" />
<input type="hidden" name="option" value="search" />
<input name="image" type="image" src="searchbutton.gif" />
<br />
</form></td>
</tr>
</table></td>
<td width="15" valign="top"><br />