RandomQuote snippet - how to display random chunk?

// RandomQuote
// Snippet to produce by sottwell.
// Posted by web_designer.
// Dated 25th Sepember 2006.

$resourceparent = $quoteid;  // the folder that contains quote documents
$output = '';  // initialise the quote variable
$resource = $modx->getActiveChildren($resourceparent,'createdon', 'DESC', $fields='content');
$limit=count($resource);
if($limit<1) {
   $output .= "No entries found.<br />";
   return $output;
}
$random = (rand(1, $limit) - 1);
$output .= $resource[$random]['content']; // get a random quote
return $output;

<?php
//Snippet randomChunk
//Uncle68 

$randomChunkName = isset($randomChunkName) ? $randomChunkName : 'randomChunk'; //Set name or use default
$noOfChunks = isset($noOfChunks) ? $noOfChunks : '0'; //Must set a value

echo '{{' . $randomChunkName . rand(1, ($noOfChunks)) . '}}';
?>

<?php
/**
 * Snippet RandomChunkLines
 *
 * @author Thomas Heuer <[email protected]>
 */

if($modx->documentObject['introtext'])
{
	return $modx->documentObject['introtext'];
}
else
{
	/* used functions */
	global $stripQuotationMarksDefined;
	if(!isset($stripQuotationMarksDefined))
	{
		function stripQuotationMarks($str)
		{
			$first = substr($str, 0, 1);
			$last = substr($str, -1);
			if( ($first == '"') || ($first == "'") )
				$str = substr($str, 1);
			if( ($last == '"') || ($last == "'") )
				$str = substr($str, 0, -1);
			return $str;
		}
		$stripQuotationMarksDefined = true;
	}
	
	/* get name of used chunk */
	$randomChunk = (isset($randomChunk)) ? stripQuotationMarks($randomChunk) : null;
	
	/* get the lines of the cunk as an array */
	$output = '';
	if(is_null($randomChunk))
	{
		$output .= 'no chunk found' . "\r";
	}
	else
	{
		$chunkLines = explode("\n", $modx->getChunk($randomChunk));
		$imgData = array_map("trim", explode("|", $chunkLines[array_rand($chunkLines)]));
		$output .= '<img src="/assets/images/' . $imgData[0] . '" alt="' . $imgData[1] . '" />';
	}
	return $output;
}
?>

pic1.jpg | Alternative text 1.
pic2.jpg | Alternative text 2.
pic3.jpg | Alternative text 3.

	<div id="introtext_content">
		[!RandomChunkLines? &randomChunk='introtext_images'!]
	</div>