SPG

function disp($pid) {if (file_exists("pic-".$pid.".JPG")) {echo "<img src=pic-".$pid.".JPG>";echo "<br><br>";if (file_exists("pic-".($pid-1).".JPG")) {echo "Previous &nbsp; ";}if (file_exists("pic-".($pid+1).".JPG")) {echo "Next";}} else {echo "this file doesn't exist, try here";}}if ($_GET['pid']) {disp($_GET['pid']);} else {disp(1);}