<?php 
$dir = "fotos/"; 
$teller=-1; 
if ($handle = opendir($dir)) { 
   while (false !== ($file = readdir($handle))) { 
if ($file != "." && $file != "..") { 
$teller++; 
$img[$teller] = $file; 
       } 
   } 

   closedir($handle); 
} 
$random = rand(0, count($img)); 
echo "<a href=$dir$img[$random] TARGET=_blank><img src=\"$dir$img[$random]\" width=140 height=170 border=0></a>"; 
?> 