<?php
        $img = 0;
        if (isset($node->field_image_cache[0]['filepath'])) {
            foreach($node->field_image_cache as $imageCache) {
                print "<a href='javascript:changePImg($img)' onMouseOver='changePImg($img)'>";
                print theme_imagecache('product_thumbnail', $imageCache['filepath']);
                print "</a>";
                $img++;
            }
        }
    ?>