{assign var='random' value=0|rand:$serendipity_event_picasa_albumItemCount-1}
{assign var='image' value=$serendipity_event_picasa_images[$random]}

<a href="{$image.itemLargeImage}"
    {if $serendipity_event_picasa_use_jswindow}
        onClick="window.open('{$image.itemLargeImage}', 'picasa', 'height={$image.itemHeight+20}, width={$image.itemWidth+20}, resizable=no, scrollbars=no, toolbar=no, status=no, menubar=no, location=no')"
    {/if}
    target="picasa"><img 
        border="0" 
        src="{$image.itemThumbnailImage}" 
        height="{$image.itemThumbnailHeight}" 
        width="{$image.itemThumbnailWidth}" 
        alt="{$image.itemCaption}" /></a>