<?php
$images = array("image1", "image2", "image3"); //Array with image names
$image = $images[array_rand($images)]; //Rolling for random image
?>
<div class="pds">
<div class="pds1">
<div><img src="<?PHP echo $layout_name.'/' ; ?>http://otland.net/images/t.jpg" alt="" /></div>
<div><img src="<?PHP echo $layout_name."/images/{$image}.jpg"?>" alt="" /></div> <!-- {$image} = random image. -->
<div class="t2">