Random pictures - not twice

["Gustav Wiberg" <info@xxxxxxxxxxx>]

Hi there!

I have created a script the generates random pictures...

<?php
//Random pictures
//
$pictures[0] = "bil1.gif";
$pictures[1] = "bil2.gif";
$pictures[2] = "bil3.gif";
$pictures[3] = "bil4.gif";


for ($i=0;$i<3;$i++) {
 $r = rand(0,3);
?>
<p>&nbsp;&nbsp;<img src="<?php echo $pictures[$r];?>"></p>
<?php

}
?>


With this above script the same picture can be shown twice. Is there any 
smart way of avoiding this without having to rely on cookies/sessionids?

Best regards
/Gustav Wiberg
Stammis Internet - http://www.stammis.com/ - pedigrees on the net

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