$res=mysql_query ("SELECT * FROM usergebs WHERE art = '$_GET[art]' AND besitzer = '$user';")
or die("Connect Fehler ");
while ($data=mysql_fetch_array($res))
{
	$produktmenge = "$data[prodmenge]";
	$produktware = "$data[prodware]";

$res=mysql_query ("SELECT * FROM user WHERE username = '$user';")
or die("Connect Fehler ");
while ($data=mysql_fetch_array($res))
{
	$lagermenge = "$data[$produktware]";
}
}