random.php

<?php

$folder = 'mfimages/';

// Space seperated list of extensions, you probably won't have to change this.
$exts = 'jpg jpeg png gif';

$files = array(); $i = -1; // Initialize some variables
if ('' == $folder) $folder = './';

$handle = opendir($folder);
$exts = explode(' ', $exts);
while (false !== ($file = readdir($handle))) {
		foreach($exts as $ext) { // for each extension check the extension
			if (preg_match('/\.'.$ext.'$/i', $file, $test)) { // faster than ereg, case insensitive
			$files[] = $file; // it's good
			++$i;
	}
}
}
closedir($handle); // We're not using it anymore
mt_srand((double)microtime()*1000000); // seed for PHP < 4.2
$rand = mt_rand(0, $i); // $i was incremented as we went along

ob_start();
echo($folder.$files[$rand]);
$Random1 = ob_get_contents();
ob_end_clean();
 // Voila!