var submitted = false;
// check for delete pictures -> additional confirm
function check_delete(myform) {
  if (submitted == true) {
    window.alert("This form has already been submitted. Please press Ok and wait for this process to be completed.");
    return false;
  }
  if (myform.elements["delete"].checked)   // Delete option is checked?
  {
    if ( window.confirm("You really want to remove this picture?") )
    {
      //myform.submit();     // OK -> Submit form for delete
      submitted = true;
      return true;
    }
    else {
      myform.elements["delete"].checked = false;
      return false;      // Cancel -> Submit canceled
    }
  }
  else
  {
      //myform.submit();
      submitted = true;
      return true;       // not a delete -> Submit normal
  }
}

// check for clean pext
function check_text(myform, myfield) {
  if (submitted == true) {
    window.alert("This form has already been submitted. Please press Ok and wait for this process to be completed.");
    return false;
  }
  if (myfield.value == "")   // Text is clean?
  {
    window.alert("Text is clear. Please, typed your comment before submit!");
    return false;      // Cancel -> Submit canceled
  }
  else
  {
      //myform.submit();
      submitted = true;
      return true;       // Submit normal
  }
}

// check for register fields
function check_register(myform) {
  var error = false;
  var error_text = "";
  if (submitted == true) {
    window.alert("This form has already been submitted. Please press Ok and wait for this process to be completed.");
    return false;
  }
  if (myform.elements["nickname"].value == "")   // Check field
  {
    error_text = error_text+"Nickname is blank.\n";
    error = true;      // Error is presend
  }
  if (myform.elements["first_name"].value == "")   // Check field
  {
    error_text = error_text+"First name is blank.\n";
    error = true;      // Error is presend
  }
  if (myform.elements["last_name"].value == "")   // Check field
  {
    error_text = error_text+"Last name is blank.\n";
    error = true;      // Error is presend
  }
  if (myform.elements["email"].value == "")   // Check field
  {
    error_text = error_text+"E-mail is blank.\n";
    error = true;      // Error is presend
  }
  if ((myform.elements["password"].value == "") ||
        (myform.elements["password"].value.length < 4) ||
        (myform.elements["password"].value.length > 12)
     )   // Check field
  {
    error_text = error_text+"Password is incorrect.\n";
    error = true;      // Error is presend
  }
  if (myform.elements["password"].value != myform.elements["password2"].value)   // Check field
  {
    error_text = error_text+"Passwords do not match.\n";
    error = true;      // Error is presend
  }

  if (error == true)   // Error field is presend
  {
    window.alert(error_text);
    return false;      // Cancel -> Submit canceled
  }
  else
  {
      //myform.submit();
      submitted = true;
      return true;       // Submit normal
  }
}