// ----------------------------------------------------------------------
//           FormCheq.js (c) ChaTo [www.chato.cl] 1998
//           basado en FormChek.js (c) Eric Krock 1997 Netscape Corp.
//           Modificado por Denis Delarze G. (c) 2000 Centro Informatico 
// ----------------------------------------------------------------------

var defaultEmptyOK = false;
var checkNiceness = true;
var digits = "0123456789";
var lowercaseLetters = "abcdefghijklmnopqrstuvwxyzáéíóúñü.";
var uppercaseLetters = "ABCDEFGHIJKLMNOPQRSTUVWXYZÁÉÍÓÚÑ.";
var whitespace = " \t\n\r";
var phoneChars = "()-+ ";
var mMessage = "Error: no puede dejar este espacio vacio";
var pPrompt = "Error: ";
var pAlphanumeric = "ingrese un texto que contenga solo letras y/o numeros";
var pAlphabetic   = "ingrese un texto que contenga solo letras";
var pInteger = "ingrese un numero entero";
var pNumber = "ingrese un numero";
var pPhoneNumber = "ingrese un número de teléfono";
var pEmail = "ingrese una dirección de correo electrónico válida";
var pName = "ingrese un texto que contenga solo letras, numeros o espacios";
var pNice = "no puede utilizar comillas aqui";
var pVerificador = "ingrese solo numeros o k";
var pDescription = "ingrese una descripcion sin comilla simples o dobles";
var pRut = "RUT no valido, verifiquelo";
var pPass = "La contraseña no fue repetida correctamente";
var pSeleccionar = "debe seleccionar una opcion";

function makeArray(n) {
   for (var i = 1; i <= n; i++) {
      this[i] = 0
   }
   return this
}

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);
        // si el caracter en que estoy no aparece en whitespace,
        // entonces retornar falso
        if (whitespace.indexOf(c) == -1) return false;
    }
    return true;
}


function stripCharsInBag (s, bag)
{   var i;
    var returnString = "";

    // Buscar por el string, si el caracter no esta en "bag", 
    // agregarlo a returnString
    
    for (i = 0; i < s.length; i++)
    {   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( ( uppercaseLetters.indexOf( c ) != -1 ) ||
            ( lowercaseLetters.indexOf( c ) != -1 ) )
}

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( i != 0 ) {
            if (!isDigit(c)) return false;
        } else { 
            if (!isDigit(c) && (c != "-") || (c == "+")) return false;
        }
    }
    return true;
}

function isVerificador (s)
{   var i;
    if (isEmpty(s)) 
       if (isVerificador.arguments.length == 1) return defaultEmptyOK;
       else return (isVerificador.arguments[1] == true);
       
    var c = s.charAt(0);
    if (!isDigit(c) && (c.toLowerCase() != "k")) return false;
    return true;
}

function isNumber (s)
{   var i;
    var dotAppeared;
    dotAppeared = false;
    if (isEmpty(s)) 
       if (isNumber.arguments.length == 1) return defaultEmptyOK;
       else return (isNumber.arguments[1] == true);
    
    for (i = 0; i < s.length; i++)
    {   
        var c = s.charAt(i);
        if( i != 0 ) {
            if ( c == "." ) {
                if( !dotAppeared )
                    dotAppeared = true;
                else
                    return false;
            } else     
                if (!isDigit(c)) return false;
        } else { 
            if ( c == "." ) {
                if( !dotAppeared )
                    dotAppeared = true;
                else
                    return false;
            } else     
                if (!isDigit(c) && (c != "-") || (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++)
    {   
        // Check that current character is letter.
        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 isName (s)
{
    if (isEmpty(s)) 
       if (isName.arguments.length == 1) return defaultEmptyOK;
       else return (isAlphanumeric.arguments[1] == true);
    
    return( isAlphanumeric( stripCharsInBag( s, whitespace ) ) );
}

function isDescription (s)
{
    if (isEmpty(s)) 
       if (isDescription.arguments.length == 1) return defaultEmptyOK;
       else return true;

    return true;
}

function isPhoneNumber (s)
{   var modString;
    if (isEmpty(s)) 
       if (isPhoneNumber.arguments.length == 1) return defaultEmptyOK;
       else return (isPhoneNumber.arguments[1] == true);
    modString = stripCharsInBag( s, phoneChars );
    return (isInteger(modString))
}

function isEmail (s)
{
    if (isEmpty(s)) 
       if (isEmail.arguments.length == 1) return defaultEmptyOK;
       else return (isEmail.arguments[1] == true);
    if (isWhitespace(s)) return false;
    var i = 1;
    var sLength = s.length;
    while ((i < sLength) && (s.charAt(i) != "@"))
    { i++
    }

    if ((i >= sLength) || (s.charAt(i) != "@")) return false;
    else i += 2;

    while ((i < sLength) && (s.charAt(i) != "."))
    { i++
    }

    if ((i >= sLength - 1) || (s.charAt(i) != ".")) return false;
    else return true;
}

function isNice(s)
{
        var i = 0;
        var sLength = s.length;
        var b = 1;
        while(i<sLength) {
                if( (s.charAt(i) == "\"") || (s.charAt(i) == "'" ) ) b = 0;
                i++;
        }
        return b;
}


function warnEmpty (theField)
{   theField.focus()
    alert(mMessage)
    return false
}

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

function warnInvalid2 (theField, s)
{   theField.focus()
    alert(s)
    return false
}

function verificaRut (theField, theFieldVerificador)
{

  var rut = theField.value;
  var dv  = theFieldVerificador.value.toLowerCase();
  var suma = 0;
  var mul = 2;
  var i = 0;

  for ( i = rut.length-1; i >= 0; i--)
  {
     suma = suma + rut.charAt(i) * mul;
     mul  = mul == 7 ? 2 : mul + 1;
  }
  var dvr = '' + (11 - suma % 11);
  if (dvr == '10' ) 
      dvr = 'k';
  else if ( dvr == '11' ) 
      dvr = '0';
  if ( dvr == dv) 
      return true;
  else 
      return warnInvalid(theField,pRut);
}

function verificaPass (theField1, theField2)
{
   if ( theField1.value == theField2.value )
      return true;
   else
      return warnInvalid(theField2,pPass);  
}

function checkSelected( theField, ValidCero )
{
if ( theField.selectedIndex == -1 )
      return warnInvalid2(theField, pSeleccionar);
if (( theField.options[theField.selectedIndex].value == '0' ) && ( !ValidCero ))
      return warnInvalid2(theField, pSeleccionar);
else
      return true;
}

function isValidDate( theField ) {

// Checks for the following valid date formats:
// DD/MM/YY   DD/MM/YYYY   DD-MM-YY   DD-MM-YYYY
// Also separates date into month, day, and year variables

var dateStr = theField.value;
var datePat = /^(\d{1,2})(\/|-)(\d{1,2})\2(\d{4})$/;

// To require a 4 o 2 digit year entry, use this line instead:
// var datePat = /^(\d{1,2})(\/|-)(\d{1,2})\2(\d{2}|\d{4})$/;

var matchArray = dateStr.match(datePat); // is the format ok?
if (matchArray == null) {
return warnInvalid(theField, "La fecha no presenta un formato valido.\n(dd/mm/yyyy)");
}
month = matchArray[3]; // parse date into variables
day = matchArray[1];
year = matchArray[4];
if (year < 1990 || year > 2010) {
return warnInvalid(theField, "El AÑO debe estar entre 1990 y 2010");
}
if (month < 1 || month > 12) { // check month range
return warnInvalid(theField, "El MES debe estar entre 1 y 12");
}
if (day < 1 || day > 31) {
return warnInvalid(theField, "El DIA debe estar entre 1 y 31");
}
if ((month==4 || month==6 || month==9 || month==11) && day==31) {
return warnInvalid(theField, "El MES "+month+" no tiene 31 días");
}
if (month == 2) { // check for february 29th
var isleap = (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0));
if (day>29 || (day==29 && !isleap)) {
return warnInvalid(theField, "Febrero de " + year + " no tiene " + day + " dias!");
   }
}
return true;  // date is valid
}


function checkField (theField, theFunction, emptyOK, s)
{   
    var msg;
    if (checkField.arguments.length < 3) emptyOK = defaultEmptyOK;
    if (checkField.arguments.length == 4) {
        msg = s;
    } else {
        if( theFunction == isAlphabetic ) msg = pAlphabetic;
        if( theFunction == isAlphanumeric ) msg = pAlphanumeric;
        if( theFunction == isInteger ) msg = pInteger;
        if( theFunction == isNumber ) msg = pNumber;
        if( theFunction == isEmail ) msg = pEmail;
        if( theFunction == isPhoneNumber ) msg = pPhoneNumber;
        if( theFunction == isName ) msg = pName;
        if( theFunction == isVerificador ) msg = pVerificador;
        if( theFunction == isDescription ) msg = pDescription;        
    }
    
    if ((emptyOK == true) && (isEmpty(theField.value))) return true;

    if ((emptyOK == false) && (isEmpty(theField.value))) 
        return warnEmpty(theField);

    if ( checkNiceness && !isNice(theField.value))
        return warnInvalid(theField, pNice);

    if (theFunction(theField.value) == true) 
        return true;
    else
        return warnInvalid(theField,msg);

}