$rooms[0][0] = $_POST['account_id'];
 $rooms[0][1] = $_POST['name'];
 $rooms[0][2] = $_POST['comments'];
 $rooms[0][3] = $_POST['code'];
 $rooms[0][4] = $_POST['capacity'];
 $rooms[0][5] = $_POST['location'];
 $rooms[0][6] = $_POST['type'];
 switch (User_Validate_Simple_Field($rooms[0][0], 32)) {
     case 0:
         $error[$num_errors++] = "The account_id must be filled";
         break;
     case -2:
         $error[$num_errors++] = "There are invalid characteres at the account_id";
         break;
     case 1:
         $current = Check_Account_Id($rooms[0][0], $bd);
         if ($current || $rooms[0][0] == 'admin') {
             $error[$num_errors++] = "This account id is already in use";
         }
         break;
 }
 switch (User_Validate_Simple_Field($rooms[0][1], 15)) {
     case 0:
         $error[$num_errors++] = "The Name must be filled";
         break;
     case -2:
         $error[$num_errors++] = "There are invalid characteres at the name";
         break;
 }
 switch (User_Validate_Simple_Field($rooms[0][2], 256)) {
     case -2:
 $courses[0][1] = $_POST['name'];
 $courses[0][2] = $_POST['comments'];
 $courses[0][3] = $_POST['code'];
 $courses[0][4] = $_POST['group'];
 $courses[0][5] = $_POST['semester'];
 $courses[0][6] = $_POST['year'];
 $courses[0][7] = $_POST['lecturer'];
 switch (User_Validate_Simple_Field($courses[0][0], 32)) {
     case 0:
         $error[$num_errors++] = "The account_id must be filled";
         break;
     case -2:
         $error[$num_errors++] = "There are invalid characteres at the account_id";
         break;
     case 1:
         $current = Check_Account_Id($courses[0][0], $bd);
         if ($current || $courses[0][0] == 'admin') {
             $error[$num_errors++] = "This account id is already in use";
         }
         break;
 }
 switch (User_Validate_Simple_Field($courses[0][1], 15)) {
     case 0:
         $error[$num_errors++] = "The Name must be filled";
         break;
     case -2:
         $error[$num_errors++] = "There are invalid characteres at the name";
         break;
 }
 switch (User_Validate_Simple_Field($rooms[0][2], 256)) {
     case -2:
 for ($i = 0; $i < count($cfg['user_type']); $i++) {
     $types .= '0';
 }
 $people[0][7] = $types;
 $people[0][8] = $_POST['category'];
 $categ = List_Categories($people[0][8], '', $bd);
 $people[0][9] = $categ[0][1];
 switch (User_Validate_Simple_Field($people[0][0], 32)) {
     case 0:
         $error[$num_errors++] = "The account_id must be filled";
         break;
     case -2:
         $error[$num_errors++] = "There are invalid characteres at the account_id";
         break;
     case 1:
         $current = Check_Account_Id($people[0][0], $bd);
         if ($current || $people[0][0] == 'admin') {
             $error[$num_errors++] = "This account id is already in use";
         }
         break;
 }
 switch (User_Validate_Simple_Field($people[0][1], 15)) {
     case 0:
         $error[$num_errors++] = "The Name must be filled";
         break;
     case -2:
         $error[$num_errors++] = "There are invalid characteres at the name";
         break;
 }
 switch (User_Validate_Simple_Field($people[0][2], 256)) {
     case -2: