Bild på sidan utan att skapa fler

Varför funkar inte detta?
Det blir bara samma bild som laddas fram hela tiden (start.jpg)

<table><tr><td>
<table width="662" bgcolor="white" cellpadding="11" cellspacing="0" border="0">
<tr>
       <td>
<? if ($_GET['bild'] == "01") { ?> 
<img src="photos/01.JPG" width="640" height="480" alt="" border="0">

<? } elseif ($_GET['bild'] == "02") { ?> 
<img src="photos/02.JPG" width="640" height="480" alt="" border="0">

<? } elseif ($_GET['bild'] == "03") { ?> 
<img src="photos/03.JPG" width="640" height="480" alt="" border="0">

<? } elseif ($_GET['bild'] == "04") { ?> 
<img src="photos/04.JPG" width="640" height="480" alt="" border="0">

<? } elseif ($_GET['bild'] == "05") {  ?> 
<img src="photos/05.JPG" width="640" height="480" alt="" border="0">

<?  } else { ?> 
	   <img src="photos/start.JPG" width="640" height="480" alt="" border="0">

<? } ?>

</td>
</tr>
<tr>
       <td height="4" background="bg.bmp"></td>
</tr>
<tr><td><a href="default.php?bild=01">01</a>&nbsp;<a href="default.php?bild=02">02</a></td></tr>
</table>
</td>
</tr>
</table>