var digits = "0123456789";
var lowercaseLetters = "aàâbcçdeéèêfghiîïjklmnoôöpqrstuùûüvwxyz";
var uppercaseLetters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
var whitespace = " \t\n\r";
var nameDelimiters = "-.'+&*/!?,:@µ#\"~ ";
var digitsInPhoneNumber = 15;
var validPhoneChars = digits + phoneNumberDelimiters;
var phoneNumberDelimiters = "+()- .";
var defaultEmptyOK = false;

function isEmpty(s) {
    return ((s == null) || (s.length == 0))
}

function isWhitespace(s) {
    var i;

    if (isEmpty(s)) return true;
    for (i = 0; i < s.length; i++)
    {   
        var c = s.charAt(i);
        if (whitespace.indexOf(c) == -1) return false; // not whitespace
    }
    return true;
}

function stripCharsInBag (s, bag){
    var i;
    var returnString = "";
    for (i = 0; i < s.length; i++)
    {   
        // Check that current character isn't whitespace.
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function stripCharsNotInBag (s, bag){
    var i;
    var returnString = "";
    for (i = 0; i < s.length; i++)
    {   
        var c = s.charAt(i);
        if (bag.indexOf(c) != -1) returnString += c;
    }
    return returnString;
}

function stripWhitespace (s){
   return stripCharsInBag (s, whitespace)
}

function charInString (c, s){
    for (i = 0; i < s.length; i++){
       if (s.charAt(i) == c) return true;
    }
    return false
}

function stripInitialWhitespace (s){
    var i = 0;
    while ((i < s.length) && charInString (s.charAt(i), whitespace))
       i++;
    return s.substring (i, s.length);
}

function isLetter (c){
   return ( ((c >= "a") && (c <= "z")) || ((c >= "A") && (c <= "Z")) )
}

function isDigit (c){
   return ((c >= "0") && (c <= "9"))
}

function isLetterOrDigit (c){
   return (isLetter(c) || isDigit(c))
}

function isInteger (s){
    var i;
    if (isEmpty(s)) 
       if (isInteger.arguments.length == 1) return defaultEmptyOK;
       else return (isInteger.arguments[1] == true);
    for (i = 0; i < s.length; i++)
    {   
        var c = s.charAt(i);
        if (!isDigit(c)) return false;
    }
    return true;
}

function isAlphabetic (s){
    var i;
    if (isEmpty(s)) 
       if (isAlphabetic.arguments.length == 1) return defaultEmptyOK;
       else return (isAlphabetic.arguments[1] == true);
    for (i = 0; i < s.length; i++)
    {   
        var c = s.charAt(i);
        if (!isLetter(c))
        return false;
    }
    return true;
}

function isAlphanumeric (s){
    var i;
    if (isEmpty(s)) 
       if (isAlphanumeric.arguments.length == 1) return defaultEmptyOK;
       else return (isAlphanumeric.arguments[1] == true);
    for (i = 0; i < s.length; i++)
    {   
        var c = s.charAt(i);
        if (! (isLetter(c) || isDigit(c) ) )
        return false;
    }
    return true;
}

function makeTitleCase(s){
  if (isEmpty(s)) 
     if (makeTitleCase.arguments.length == 1) return defaultEmptyOK;
     else return (makeTitleCase.arguments[1] == true);
  count = 1;
  ws = 0;
  s = s.charAt(0).toUpperCase()+s.substring(1,s.length);
  while (count < s.length){
    if (isWhitespace(s.charAt(count)) || (s.charAt(count) == ".") || (s.charAt(count) == "-")) ws = 1;
    else if ((ws == 1) && (isLetter(s.charAt(count)))){
      s = s.substring(0,count)+s.charAt(count).toUpperCase()+s.substring(count+1,s.length);
      ws = 0;
    }
    count++;
  }
  return s;
}

function isPhoneNumber (s){
    if (isEmpty(s)) 
       if (isPhoneNumber.arguments.length == 1) return defaultEmptyOK;
       else return (isPhoneNumber.arguments[1] == true);
    //return (isInteger(s) && s.length == digitsInPhoneNumber)
	if (s.length > digitsInPhoneNumber) return false;
	return true;
}

function isEmail(str)
{
	var expressionReguliere = /^[a-z0-9\-_\.]+@[a-z0-9\-_\.]+\.[a-z]{2,5}$/
	return expressionReguliere.test(str);
}

function warnInvalid (theField,s)
{
//    theField.focus();
    theField.select();
    alert(s);
    return false;
}

function checkString (theField, emptyOK)
{
    if (checkString.arguments.length == 1) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;
    if (isWhitespace(theField.value)) return false;
    else return true;
}

function checkInteger (theField, emptyOK)
{
    if (checkInteger.arguments.length == 1) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;
    if (!isInteger(theField.value)) return false;
    else return true;
}

function checkPhone (theField, emptyOK)
{   if (checkPhone.arguments.length == 1) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;
    else
    {  var normalizedPhone = stripCharsInBag(theField.value, phoneNumberDelimiters)
       if (isEmpty(theField.value)) return emptyOK;
	   if (!isPhoneNumber(normalizedPhone, false)) return false;
       return true;
    }
}

function checkEmail (theField, emptyOK)
{
    if (checkEmail.arguments.length == 1) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;
    else {
       if (isEmpty(theField.value)) return emptyOK;
	   if (!isEmail(theField.value)) return false;
       return true;
    }
}

function checkName(theField,emptyOK)
{
    if (checkName.arguments.length == 1) emptyOK = defaultEmptyOK;
    if (isEmpty(theField.value)) return emptyOK;
    else {
        if (!isAlphabetic(stripCharsInBag(theField.value,nameDelimiters))) return false;
        else {
          theField.value = makeTitleCase(theField.value);
          return true;
        }
    }
}