Problem with ocasional blank value

Hi All, I have a problem that the below code which is supposed to display a random image and on occasion it shows NO image. I'm not sure what is happening. This is running on linux just in case that makes any difference. <% $image_folder = "new_random/"; $dir = $_SERVER['DOCUMENT_ROOT'] . "/" . $image_folder; $image_array = array(); # The user doesn"t need to see any errors $dir_handle = @opendir($dir); while (false !== ($file = readdir($dir_handle))) if (!is_dir($file)) $image_array[] = $file; # closedir ($dir_handle); # # The following appears to make things more random srand((double)microtime()*1000000); $r = rand(0,sizeof($image_array)-1); # echo "<img src=\"{$image_folder}{$image_array[$r]}\" width = \"561\" height = \"400\" >"; %></td> Thanks!