사진 바뀌는거 질문좀 할께요 !!!

<? $a = $_GET['a'];
if($bo_table =='g_list'){?>
<td width="750"><img src="/images/ydl_title.jpg" width="750" height="46" /></td>
</tr>
<? }else if($bo_table =='g_list2'){?>
<td width="750"><img src="/images/ysl_title.jpg" width="750" height="46" /></td>
</tr>
<? }else if($bo_table =='g_list'){?>
<td width="750"><img src="/images/ydw_title.jpg" width="750" height="46" /></td>
</tr>
<? }else if($bo_table =='g_list2'){?>
<td width="750"><img src="/images/ysw_title.jpg" width="750" height="46" /></td>
</tr>
<? }else if($bo_table =='community'){?>
<td width="750"><font size="5"><img src="/images/bunhal_title.jpg" width="750" height="46" /></td>
</tr>
<? } ?>

소스 부분입니다

$_SERVER['PHP_SELF'] 혹은
$_SERVER['SCRIPT_NAME'] 을 이용하셔서 하시면 될 듯요