Either in the container one or two you should have this kind of code
Code
<!-- <block> -->
<?if($SEARCH_FORM$)?>
<table border="0" cellpadding="0" cellspacing="0" style="background:#565B66;" width="203">
<tr><td style="background:url('/.s/t/531/7.gif') #9498A1;padding-left:50px;text-transform:uppercase; font-size:10px;color:#FFFFFF;" height="41"><b><!-- <bt> --><!--<s3163>-->Search<!--</s>--><!-- </bt> --></b></td></tr>
<tr><td style="background:#565B66;padding:5px;border-left:1px solid #9498A1;border-right:1px solid #9498A1;"><div align="center"><!-- <bc> -->$SEARCH_FORM$<!-- </bc> --></div></td></tr>
<tr><td><img src="/.s/t/531/8.gif" border="0"></td></tr>
</table>
<?endif?>
<!-- </block> -->
you can modify this code to look like the image you provided above. (for your information this code is from design 531 your code might just look a little bit different)
