// ----------------------------------------------------------------------
// Javascript form validation routines.
// Author: Stephen Poley
//
// Simple routines to quickly pick up obvious typos.
// All validation routines return true if executed by an older browser:
// in this case validation must be left to the server.
//
// Update Jun 2005: discovered that reason IE wasn't setting focus was
// due to an IE timing bug. Added 0.1 sec delay to fix.
//
// Update Oct 2005: minor tidy-up: unused parameter removed
//
// Update Jun 2006: minor improvements to variable names and layout
// ----------------------------------------------------------------------

var nbsp = 160;		// non-breaking space char
var node_text = 3;	// DOM text node-type
var emptyString = /^\s*$/ ;
var global_valfield;	// retain valfield for timer thread
var color_ok = "#FFFFFF";
var msg_name;
var msg_language;
var msg_email_empty;
var msg_email_short;
var msg_email_confirmation_fail
var msg_mandatory;
var msg_telephone_short;
var msg_telephone_invalid;
var msg_zipcode;


msg_language = getCookie('sitelanguage');
//define error msgs in French.
	if (msg_language == 'fr') {
		msg_mandatory = 'obligatoire';	
		msg_email_empty = 'Vous n\'avez pas saisie une addresse e-mail valide';
		msg_email_short = 'Controler votre adresse email svp';
		
	}
//define error msgs in Dutch
	if (msg_language == 'nl') {
		msg_mandatory = 'verplicht';	
		msg_email_empty = 'U heeft geen (geldig) e-mail adres ingevuld';
		msg_email_short = 'Controleer of het email adres juist is ingevuld';
		
	}
if (msg_language == 'en') {
		msg_mandatory = 'mandatory';	
		msg_email_empty = 'You did not enter a valid email address';
		msg_email_short = 'Check if the email address is correct';
}
if (msg_language == 'de') {
		msg_mandatory = 'verpflichtet';	
		msg_email_empty = 'Sie haben kein gültigen E-mail Adresse eingegeben';
		msg_email_short = 'Bitte kontrolieren Sie die E-mail Adresse';
	
}
// --------------------------------------------
//                  trim
// Trim leading/trailing whitespace off string
// --------------------------------------------

function trim(str)
{
  return str.replace(/^\s+|\s+$/g, '');
}


// --------------------------------------------
//                  setfocus
// Delayed focus setting to get around IE bug
// --------------------------------------------

function setFocusDelayed()
{
  global_valfield.focus();
  global_valfield.style.backgroundColor  = "#F08080";
}

function setfocus(valfield)
{
  // save valfield in global variable so value retained when routine exits
  global_valfield = valfield;
  setTimeout( 'setFocusDelayed()', 100 );
}


// --------------------------------------------
//                  msg
// Display warn/error message in HTML element.
// commonCheck routine must have previously been called
// --------------------------------------------

function msg(fld,     // id of element to display message in
             msgtype, // class to give element ("warn" or "error")
             message) // string to display
{
  // setting an empty string can give problems if later set to a 
  // non-empty string, so ensure a space present. (For Mozilla and Opera one could 
  // simply use a space, but IE demands something more, like a non-breaking space.)
  var dispmessage;
  if (emptyString.test(message)) 
    dispmessage = String.fromCharCode(nbsp);    
  else  
    dispmessage = message;

  var elem = document.getElementById(fld);
  elem.firstChild.nodeValue = dispmessage;  
  
  elem.className = msgtype;   // set the CSS class to adjust appearance of message
}

// --------------------------------------------
//            commonCheck
// Common code for all validation routines to:
// (a) check for older / less-equipped browsers
// (b) check if empty fields are required
// Returns true (validation passed), 
//         false (validation failed) or 
//         proceed (don't know yet)
// --------------------------------------------

var proceed = 2;  

function commonCheck    (valfield,   // element to be validated
                         infofield,  // id of element to receive info/error msg
                         required)   // true if required
{
  if (!document.getElementById) 
    return true;  // not available on this browser - leave validation to the server
  var elem = document.getElementById(infofield);
  if (!elem.firstChild) return true;  // not available on this browser 
  if (elem.firstChild.nodeType != node_text) return true;  // infofield is wrong type of node  

  if (emptyString.test(valfield.value)) {
    if (required) {
      msg (infofield, "error", msg_mandatory);
      setfocus(valfield);
      return false;
    }
    else {
      msg (infofield, "warn", "");   // OK
      valfield.style.backgroundColor = color_ok;
      return true;  
    }
  }
  return proceed;
}

// --------------------------------------------
//            validatePresent
// Validate if something has been entered
// Returns true if so 
// --------------------------------------------

function validatePresent(valfield,   // element to be validated
                         infofield ) // id of element to receive info/error msg
{
  var stat = commonCheck (valfield, infofield, true);
  if (stat != proceed) return stat;

  msg (infofield, "warn", "");
  valfield.style.backgroundColor = color_ok;
  return true;
}

// --------------------------------------------
//               validateEmail
// Validate if e-mail address
// Returns true if so (and also if could not be executed because of old browser)
// --------------------------------------------

function validateEmail  (valfield,   // element to be validated
                         infofield,  // id of element to receive info/error msg
                         required)   // true if required
{
  var stat = commonCheck (valfield, infofield, required);
  if (stat != proceed) return stat;

  var tfld = trim(valfield.value);  // value of field with whitespace trimmed off
  var email = /^[^@]+@[^@.]+\.[^@]*\w\w$/  ;
  if (!email.test(tfld)) {
    msg (infofield, "error", msg_email_empty);
    setfocus(valfield);
    return false;
  }

  var email2 = /^[A-Za-z][\w.-]+@\w[\w.-]+\.[\w.-]*[A-Za-z][A-Za-z]$/  ;
  if (!email2.test(tfld)) 
    msg (infofield, "warn", msg_email_short);
  else
    msg (infofield, "warn", "");
    valfield.style.backgroundColor = color_ok;
  return true;
}


// --------------------------------------------
//            validateTelnr
// Validate telephone number
// Returns true if so (and also if could not be executed because of old browser)
// Permits spaces, hyphens, brackets and leading +
// --------------------------------------------

function validateTelnr  (valfield,   // element to be validated
                         infofield,  // id of element to receive info/error msg
                         required)   // true if required
{
  var stat = commonCheck (valfield, infofield, required);
  if (stat != proceed) return stat;

  var tfld = trim(valfield.value);  // value of field with whitespace trimmed off
  var telnr = /^\+?[0-9 ()-]+[0-9]$/  ;
  if (!telnr.test(tfld)) {
    msg (infofield, "error", "Dit is geen geldig telefoonnummer");
    setfocus(valfield);
    return false;
  }

  var numdigits = 0;
  for (var j=0; j<tfld.length; j++)
    if (tfld.charAt(j)>='0' && tfld.charAt(j)<='9') numdigits++;

  if (numdigits<6) {
    msg (infofield, "error",  + numdigits + " " + msg_telephone_short);
    setfocus(valfield);
    return false;
  }

  if (numdigits>14)
    msg (infofield, "warn", numdigits + " cijfers");
      else { 
    if (numdigits<10)
      msg (infofield, "warn", "U heeft slechts " + numdigits + " cijfers ingevuld");
      
    else
      msg (infofield, "warn", "");
      valfield.style.backgroundColor = color_ok;  }
  return true;
}

// --------------------------------------------
//             validateAge
// Validate person's age
// Returns true if OK 
// --------------------------------------------

function validateAge    (valfield,   // element to be validated
                         infofield,  // id of element to receive info/error msg
                         required)   // true if required
{
  var stat = commonCheck (valfield, infofield, required);
  if (stat != proceed) return stat;

  var tfld = trim(valfield.value);
  var ageRE = /^[0-9]{1,3}$/
  if (!ageRE.test(tfld)) {
    msg (infofield, "error", "ERROR: not a valid age");
    setfocus(valfield);
    return false;
  }

  if (tfld>=200) {
    msg (infofield, "error", "ERROR: not a valid age");
    setfocus(valfield);
    return false;
  }

  if (tfld>110) msg (infofield, "warn", "Older than 110: check correct");
  else {
    if (tfld<7) msg (infofield, "warn", "Bit young for this, aren't you?");
    else        msg (infofield, "warn", "");
  }
  return true;
}


// --------------------------------------------
//             validateZipcode
// Validate person's age
// Returns true if OK 
// --------------------------------------------
function validateZipcode    (valfield,   // element to be validated
                         		infofield,  // id of element to receive info/error msg
                         		required)   // true if required
{
  var stat = commonCheck (valfield, infofield, required);
  if (stat != proceed) return stat;

  var tfld = trim(valfield.value);
  var zipRE = /^[1-9]\d{3}\s?[a-zA-Z]{2}$/;
  if (!zipRE.test(tfld)) {
    msg (infofield, "error", "Dit is geen geldige postcode");
    valfield.style.backgroundColor  = "#F08080";
    setfocus(valfield);
    return false;
  } else  {
  	msg (infofield, "warn", "");
  	valfield.style.backgroundColor  = color_ok;
  }
  return true;
}

//-----------------------------------------------
//				validateEmailConfirmation 
//Validate if the e-mail confirmation is the same as 
//the email address entered in the main e-mail field 
//Returns true if OK
//-----------------------------------------------

function validateEmailConfirmation  (valfield, //main email field
									 valfield_value,
									 valfield2_value,//field to be matched
									 infofield,// id of element to recieve info/error msg
									 required) 
{ 
	if (valfield_value == "") 
		{msg(infofield, "warn", "")
		valfield.style.backgroundColor  = color_ok;
	}
 

	if (valfield_value.toLowerCase() != valfield2_value.toLowerCase()) {
		msg(infofield, "error", msg_email_short);
		valfield.style.backgroundColor  = "#F08080";
		setfocus(valfield);
		return false;
   } else  {
		msg (infofield, "warn", "");
		valfield.style.backgroundColor  = color_ok;
	}
  return true;
 }
 
function checkconfirmation (valfield, valfield_value, valfield2_value)
{
if (valfield2_value == "") {
	return; 
	} else {
	validateEmailConfirmation(valfield,valfield_value,valfield2_value,'inf_email_confirmation',true); 
	}
}