// Voir http://www.commentcamarche.net/javascript/jsevent.php3

// ----------------------------------------------------------------------
// Javascript form validation routines.
// Voir http://www.xs4all.nl/~sbpoley/webmatters/formval.html
// 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
//
// Modified by François Cerbelle
// ----------------------------------------------------------------------

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

// --------------------------------------------
//                  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();
}

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(field,
             msgtype, // class to give element ("warn" or "crit")
             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 id_infofield = field.id+'_hlp';
  var infofield = document.getElementById(id_infofield);
  infofield.innerHTML = message;
//  infofield.firstChild.nodeValue = dispmessage;  
//  
//  infofield.className = 'msg_'+msgtype;   // set the CSS class to adjust appearance of message
  if (msgtype == "crit")
    infofield.style.backgroundColor='#FFAFAF';
  else if (msgtype == 'warn')
    infofield.style.backgroundColor='#FFFFAF';
  else
    infofield.style.backgroundColor='#AFFFAF';
}

// --------------------------------------------
//            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    (field,   // element to be validated
                         required)   // true if required
{
  if (!document.getElementById) 
    return true;  // not available on this browser - leave validation to the server
  var id_field = field.id;
  var id_infofield = id_field+'_hlp';
//  var infofield = document.getElementById(id_infofield);
//  if (!infofield.firstChild) return true;  // not available on this browser 
//  if (infofield.firstChild.nodeType != node_text) return true;  // infofield is wrong type of node  

  if (emptyString.test(field.value)) {
    if (required) {
      msg (field, "crit", "Champ obligatoire");  
      return false;
    }
    else {
      msg (field, "warn", "");   // OK
      return true;  
    }
  }
  return proceed;
}

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

function validatePresent(field)   // element to be validated
{
  var stat = commonCheck (field, true);
  if (stat != proceed) return stat;

  msg (field, "info", "");  
  return true;
}

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

function validateRecommended(field)   // element to be validated
{
  var stat = commonCheck (field, false);
  if (stat != proceed) { msg (field, "warn", "Champ facultatif recommandé"); return stat; };

  msg (field, "info", "");  
  return true;
}

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

function validateAddress  (field,   // element to be validated
                           required)   // true if required
{
  var stat = commonCheck (field, required);
  if (stat != proceed) return stat;

  var tfld = trim(field.value);  // value of field with whitespace trimmed off
  var adresse = /^[0-9a-z,'"\- àâéèëêîïöôùüûç.]*$/i ;
  if (!adresse.test(tfld)) {
    msg (field, "warn", "Caractères inhabituels dans l'adresse - vérifiez-la");
    return true;
  }

  msg (field, "info", "");
  return true;
}

// --------------------------------------------
//               validateZipcode
// Validate codepostal
// Returns true if so (and also if could not be executed because of old browser)
// --------------------------------------------

function validateZipcode  (field,   // element to be validated
                           required)   // true if required
{
  var stat = commonCheck (field, required);
  if (stat != proceed) return stat;

  var tfld = trim(field.value);  // value of field with whitespace trimmed off
  var zip = /^[0-9][AB0-9][0-9]{3}$/i ;
  if (!zip.test(tfld)) {
    msg (field, "crit", "Code postal invalide");
    return false;
  }

  msg (field, "info", "");
  return true;
}

// --------------------------------------------
//               validateCity
// Validate city
// Returns true if so (and also if could not be executed because of old browser)
// --------------------------------------------

function validateCity  (field,   // element to be validated
                        required)   // true if required
{
  var stat = commonCheck (field, required);
  if (stat != proceed) return stat;

  var tfld = trim(field.value);  // value of field with whitespace trimmed off
  var city = /^[0-9a-z,'"\- àâéèëêîïöôùüûç.]*$/i ;
  if (!city.test(tfld)) {
    msg (field, "warn", "Caractères inhabituels dans le nom de la ville - vérifiez-le");
    return true;
  }

  msg (field, "info", "");
  return true;
}

// --------------------------------------------
//            validatePhone
// 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 validatePhone  (field,   // element to be validated
                         required)   // true if required
{
  var stat = commonCheck (field, required);
  if (stat != proceed) return stat;

  var tfld = trim(field.value);  // value of field with whitespace trimmed off
  var telnr = /^\+?[0-9 ()-]+[0-9]$/  ;
  if (!telnr.test(tfld)) {
    msg (field, "crit", "Les caractères autorisés sont chiffres, espaces, ()- et le + initial.");
    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 (field, "crit", "" + numdigits + " chiffres - numéro trop court");
    return false;
  }

  if (numdigits>14)
    msg (field, "warn", numdigits + " chiffres - vérifiez");
  else { 
    if (numdigits<10)
      msg (field, "warn", "Seulement " + numdigits + " chiffres - vérifiez");
    else
      msg (field, "info", "");
  }
  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  (field,   // element to be validated
                         required)   // true if required
{
  var stat = commonCheck (field, required);
  if (stat != proceed) return stat;

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

  var email2 = /^[A-Za-z][\w.-]+@\w[\w.-]+\.[\w.-]*[A-Za-z][A-Za-z]$/  ;
  if (!email2.test(tfld)) 
    msg (field, "warn", "Adresse électronique inhabituelle, vérifiez-la.");
  else
    msg (field, "info", "");
  return true;
}

// --------------------------------------------
//               validateWWW
// Validate web site
// Returns true if so (and also if could not be executed because of old browser)
// --------------------------------------------

function validateWWW  (field,   // element to be validated
                       required)   // true if required
{
  var stat = commonCheck (field, required);
  if (stat != proceed) return stat;

  var tfld = trim(field.value);  // value of field with whitespace trimmed off
  var www = /^(http:\/\/|https:\/\/){0,1}[A-Za-z0-9][A-Za-z0-9\-\.]+[A-Za-z0-9]\.[A-Za-z]{2,}[\43-\176]*$/  ;
  if (!www.test(tfld)) {
    msg (field, "crit", "adresse de site invalide");
    return false;
  }

  msg (field, "info", "");
  return true;
}

// --------------------------------------------
//               validateName
// Validate Name
// Returns true if so (and also if could not be executed because of old browser)
// --------------------------------------------

function validateName  (field,   // element to be validated
                        required)   // true if required
{
  var stat = commonCheck (field, required);
  if (stat != proceed) return stat;

  var tfld = trim(field.value);  // value of field with whitespace trimmed off
  var name = /^[0-9a-z,'"\- àâéèëêîïöôùüûç.]*$/i ;
  if (!name.test(tfld)) {
    msg (field, "warn", "Caractères inhabituels");
    return true;
  }

  msg (field, "info", "");
  return true;
}

// --------------------------------------------
//               validateDate
// Validate date
// Returns true if so (and also if could not be executed because of old browser)
// --------------------------------------------

function validateDate  (field,   // element to be validated
                        required)   // true if required
{
  var stat = commonCheck (field, required);
  if (stat != proceed) return stat;

  var tfld = trim(field.value);  // value of field with whitespace trimmed off
  var dateexp = /^(0?[1-9]|[12][0-9]|3[01])\/(0?[1-9]|1[012])\/(19|20)?[0-9]{2,2}$/ ;
  if (!dateexp.test(tfld)) {
    msg (field, "crit", "Date invalide");
    return false;
  }

  msg (field, "info", "");
  return true;
}

// --------------------------------------------
//               validateTime
// Validate date
// Returns true if so (and also if could not be executed because of old browser)
// --------------------------------------------

function validateTime  (field,   // element to be validated
                        required)   // true if required
{
  var stat = commonCheck (field, required);
  if (stat != proceed) return stat;

  var tfld = trim(field.value);  // value of field with whitespace trimmed off
  var time = /^([01]?[0-9]|2[0-3])(:[0-5][0-9](:[0-5][0-9])?)?$/ ;
  if (!time.test(tfld)) {
    msg (field, "crit", "Heure invalide");
    return false;
  }

  msg (field, "info", "");
  return true;
}