next/previous button help

Hello. im unsure if it's here i should ask but i belive this can be solved in php. i have this page where i have some random flash files named from 1 to 10(and adding more all the time). i was wondering how i can make the previous and next buttons work? so if i watch the flash 1.swf next button should take me to 2.swf etc.

<?
$files = glob('*.jpg');
rsort($files);
?>

</form>
	<table border="1" width="100%">
		<tr>
			<td><p>
			<object classid="clsid:D27CDB6E-AE6D-11CF-96B8-444553540000" id="obj1" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,40,0" border="0" width="1192" height="534">
				<param name="movie" value="/1.swf">
				<param name="quality" value="High">
				<embed src="/1.swf" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" name="obj1" width="1192" height="534"></object>
			</p>
			<p align="center">
	<input type="submit" name="btn_previous" value="&lt;&lt; Previous" id="btn_previous" style="width:100px;" />
	<input type="submit" name="btn_next" value="Next >>" id="btn_next" style="width:100px;" />
			</td>
		</tr>
	</table>

HTML:

 

you need to make a real form (starting <form> and closing </form>) then remember the current ID in a hidden field (<input type="hidden" name="current" value="currentnumber">) and then check if the previous or next button is clicked

$_POST
$_SERVER['REQUEST_METHOD']

Have fun!