function controleerNumberRangeMetMelding(obj, minVal, maxVal, naam)
{
  melding1 = "Minimale waarde voor veld " + naam + " is " + minVal
  melding2 = "Maximale waarde voor veld " + naam + " is " + maxVal

  if (languageKeyword == 'UK')
  {
    melding1 = "Minimum value of " + naam + " is " + minVal
    melding2 = "Maximum value of " + naam + " is " + maxVal
  }
  else if (languageKeyword == 'FR')
  {
    melding1 = "Valeur minimale pour champ " + naam + " est " + minVal
    melding2 = "Valeur maximale pour champ " + naam + " est " + maxVal
  }

  if (eval(minVal) > eval(obj.value))
  {
    alert(melding1);
    obj.focus();
    return(false);
  }

  if (eval(obj.value) > eval(maxVal))
  {
    alert(melding2);
    obj.focus();
    return(false);
  }

  return(true);
}

function controleerVeldIngevuld(obj, naam)
{
  melding1 = "Veld " + naam + " is verplicht"

  if (languageKeyword == 'UK')
  {
    melding1 = "Field " + naam + " is required"
  }
  else if (languageKeyword == 'FR')
  {
    melding1 = "Champ " + naam + " est obligatoire"
  }

  if (obj.value == "")
  {
    alert(melding1);
    obj.focus();
    return (false);
  }
  return(true);
}

function controleerVeldIngevuldNoFocus(obj, naam)
{
  melding1 = "Veld " + naam + " is verplicht"

  if (languageKeyword == 'UK')
  {
    melding1 = "Field " + naam + " is required"
  }
  else if (languageKeyword == 'FR')
  {
    melding1 = "Champ " + naam + " est obligatoire"
  }

  if (obj.value == "")
  {
    alert(melding1);
    return (false);
  }
  return(true);
}

function controleerLengteString(obj, minNumChars, maxNumChars, numChars, naam)
{
  if (!controleerLengteStringByValue(obj.value, minNumChars, maxNumChars, numChars, naam))
  {
    obj.focus();
    return(false);
  }
  return (true);
}

function controleerLengteStringByValue(objValue, minNumChars, maxNumChars, numChars, naam)
{
  melding1 = "Het veld " + naam + " moet uit " + numChars + " karakters bestaan";
  melding2 = "Het veld " + naam + " bevat te weinig karakters (minimaal: " + minNumChars + ")";
  melding3 = "Het veld " + naam + " bevat te veel karakters (maximaal: " + maxNumChars + ")";

  if (languageKeyword == 'UK')
  {
    melding1 = "This record has to consist of " + numChars + " characters";
    melding2 = "This record requires a minimum number of characters of " + minNumChars;
    melding3 = "This record requires a maximum number of characters of " + maxNumChars;
  }
  else if (languageKeyword == 'FR')
  {
    melding1 = "Le champ " + naam + " doit consister de " + numChars + " caractères";
    melding2 = "Le champ " + naam + " contient trop peu de caractères (minimum: " + minNumChars + ")";
    melding3 = "Le champ " + naam + " contient trop de caractères (maximum: " + maxNumChars + ")";
  }

  if (numChars != objValue.length && 0 < numChars)
  {
    alert(melding1);
    return(false);
  }

  if (minNumChars > objValue.length && 0 <= minNumChars)
  {
    alert(melding2);
    return(false);
  }

  if (maxNumChars < objValue.length && 0 <= maxNumChars)
  {
    alert(melding3);
    return(false);
  }

  return (true);
}

function checkStringContentMetMelding(obj, allowedChars, naam)
{
  melding1 = "In het veld " + naam + " komen karakters voor die niet zijn toegestaan (toegestaan: " + allowedChars + ")"

  if (languageKeyword == 'UK')
  {
    melding1 = "Characters in string that are not allowed (allowed: " + allowedChars + ")"
  }
  else if (languageKeyword == 'FR')
  {
    melding1 = "Dans le champ " + naam + " apparaissent des caractères qui ne sont pas permis (permis: " + allowedChars + ")"
  }

  for (var i = 0; i < obj.value.length; i++)
  {
    var c = obj.value.charAt(i)

    if (allowedChars.indexOf(c) == -1)
    {
      alert(melding1);
      obj.select();
      obj.focus();
      return (false);
    }
  }

  return (true);
}

function controleerIntegerSyntaxMetMelding(obj, naam)
{
  melding1 = "In veld " + naam + " mogen alleen getallen worden ingevoerd"

  if (languageKeyword == 'UK')
  {
    melding1 = "Field " + naam + " only allows numbers"
  }
  else if (languageKeyword == 'FR')
  {
    melding1 = "Dans champ " + naam + " vous pouvez insérer que des chiffres"
  }

  for (var i=0;i<obj.value.length;i++)
  {
    var digit=obj.value.charAt(i)
    if (!(digit >= "0" && digit <= "9"))
    {
      alert(melding1);
      obj.focus();
      return (false);
    }
  }
  return(true);
}

function controleerFloatSyntaxMetMelding(obj, naam)
{
  melding1 = "In veld " + naam + " mogen alleen decimale getallen worden ingevoerd"

  if (languageKeyword == 'UK')
  {
    melding1 = "Field " + naam + " only allows decimal numbers"
  }
  else if (languageKeyword == 'FR')
  {
    melding1 = "Dans champ " + naam + " vous pouvez insérer que des chiffres décimaux"
  }

  sepFound = 0;

  for (var i=0;i<obj.value.length;i++)
  {
    var digit=obj.value.charAt(i)
    if (!(digit >= "0" && digit <= "9") && ((!(digit == ",")) || (digit == "," && sepFound == 1)) && ((!(digit == ".")) || (digit == "." && sepFound == 1)))
    {
      alert(melding1);
      obj.focus();
      return (false);
    }

    if (digit == "," || digit == ".")
    {
      sepFound = 1;
    }
  }
  return(true);
}

function controleerInteger(getal)
{
  for (var i=0;i<getal.length;i++)
  {
    var digit=getal.charAt(i)
    if (!(digit >= "0" && digit <= "9"))
    {
      return (false);
    }
  }
  return(true);
}

function controleerFloat(getal)
{
  for (var i=0;i<getal.length;i++)
  {
    var digit=getal.charAt(i)
    if (!(digit >= "0" && digit <= "9") && !(digit == ".") && !(digit == ","))
    {
      return (false);
    }
  }
  return(true);
}