图片显示就只有一个框---什么都没有，包括错误提示！！


<?
$db="web";
mysql_connect() or die("Unable to connect to SQL server");
mysql_select_db($db) or die("Unable to select database");
$result=mysql_query("SELECT * FROM te_chan") or die("Cant Perform Query");
if($result){
$r=mysql_fetch_array($result);
$id=$r->id;
echo " "; }
?>


-------------------------second.php--------------------------------------------------
<?
$db="web";
mysql_connect() or die("Unable to connect to SQL server");
mysql_select_db($db) or die("Unable to select database");
$result=mysql_query("SELECT * FROM te_chan WHERE id=\"$id\"") or die("Cant perform Query");
if($result){
$r=mysql_fetch_array($result);
Header( "Content-type: image/jpeg");
echo $r->Image;}
?>