function irapag(pagina, url, regs, param)
{
	var go_to = url+"?inicio="+(parseInt(regs)*parseInt(pagina))+"&pag="+(parseInt(pagina) + 1)+param;
	
	//alert(goto);
	document.location=goto;
}

//FUNCIONES VARIAS DE VALIDACION DE FORMULARIOS

/* EXPRESIONES REGULARES COMUNES
* D.N.I.: ^\d{1,8}$
* Entero: ^(?:\+|-)?\d+$
* Real: ^(?:\+|-)?\d+\.\d*$
* Hora: ^([01]?[0-9]|[2][0-3])(:[0-5][0-9])?$
* Fecha: ^([012][1-9]|3[01])(/|-)(0[1-9]|1[012])\2(\d{4})$
* Email: (^[0-9a-zA-Z]+(?:[._][0-9a-zA-Z]+)*)@ ([0-9a-zA-Z]+(?:[._-][0-9a-zA-Z]+)*\.[0-9a-zA-Z]{2,3})$
*/

function validateValue( strValue, strMatchPattern ) {
/************************************************
DESCRIPTION: Validates that a string a matches
  a valid regular expression value.

PARAMETERS:
   strValue - String to be tested for validity
   strMatchPattern - String containing a valid
      regular expression match pattern.

RETURNS:
   True if valid, otherwise false.
*************************************************/
var objRegExp = new RegExp( strMatchPattern);

 //check if string matches pattern
 return objRegExp.test(strValue);
}

function Hora( strHora )
{
	
	return validateValue( strHora, "^([01]?[0-9]|[2][0-3])(:[0-5][0-9])?$");
}

function FechaStrToDate(dateStr)
{
var datePat = /^(\d{1,2})(\/|-)(\d{1,2})\2(\d{2}|\d{4})$/;
var matchArray = dateStr.match(datePat);
		
	if (matchArray == null)
		return false;
	else
	{
		var month = matchArray[3]; // parse date into variables
		var day = matchArray[1];
		var year = matchArray[4];
		
		var fecha = new Date(year,month-1,day);
		return fecha;
	}
}

function Fecha(dateStr)
{
// Checks for the following valid date formats:
// MM/DD/YY   MM/DD/YYYY   MM-DD-YY   MM-DD-YYYY
// Also separates date into month, day, and year variables

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

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

var matchArray = dateStr.match(datePat); // is the format ok?
	if (matchArray == null) 
	{
		//alert("La fecha no está en un formato válido.")
		return false;
	}
	month = matchArray[3]; // parse date into variables
	day = matchArray[1];
	year = matchArray[4];
	if (month < 1 || month > 12) 
	{ // check month range
		//alert("El mes debe estar entre 1 y 12.");
		return false;
	}
	if (day < 1 || day > 31) 
	{
		//alert("El día debe estar entre 1 y 31.");
		return false;
	}
	if ((month==4 || month==6 || month==9 || month==11) && day==31) 
	{
		//alert("El mes "+month+" no tiene 31 dias!")
		return false
	}
	if (month == 2) 
	{ // check for february 29th
		var isleap = (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0));
		if (day>29 || (day==29 && !isleap)) 
		{
			//alert("Febrero de " + year + " no tiene " + day + " dias!");
			return false;
		}
	}
	
	return true;  // date is valid
}


/****************************************************************/
// whitespace characters
function Vacio(s)
{   
	return ((s == null) || (s.length == 0))
}

// Returns true if string s is empty or 
// whitespace characters only.
function EnBlanco(s)
{   
var i;
var whitespace = " \t\n\r";

    // Is s empty?
    if (Vacio(s)) return true;

    // Search through string's characters one by one
    // until we find a non-whitespace character.
    // When we do, return false; if we don't, return true.

    for (i = 0; i < s.length; i++)
    {   
	// Check that current character isn't whitespace.
	var c = s.charAt(i);

	if (whitespace.indexOf(c) == -1) return false;
    }

    // All characters are whitespace.
    return true;
}

/****************************************************************/

// Email (STRING s [, BOOLEAN emptyOK])
// 
// Email address must be of form a@b.c ... in other words:
// * there must be at least one character before the @
// * there must be at least one character before and after the .
// * the characters @ and . are both required
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function Email(s)
{
    // is s whitespace?
    if (EnBlanco(s)) return false;
    
    // there must be >= 1 character before @, so we
    // start looking at character position 1 
    // (i.e. second character)
    var i = 1;
    var sLength = s.length;

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

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

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

    // there must be at least one character after the .
    if ((i >= sLength - 1) || (s.charAt(i) != ".")) return false;
    else return true;
}

function LongMax(objField, nLength, strWarning)
{
	var strField = new String(objField.value);

	if (strField.length > nLength) {
		alert(strWarning);
		return false;
	} else
		return true;
}

function Digito(valor){
   numero=parseInt(valor);
   if (!(numero>=0 && numero<=9)){
	alert("Introduzca un número entre 0 y 9");
	return(false);
   }
   return(true);
}
function Rango(valor,min,min){
   numero=parseInt(valor);
   if (!(numero>=min && numero<=min)){
	alert("Introduzca un número entre " + min+ " y " + max);
	return(false);
   }
   return(true);
}
function Numero(valor){
   nume=parseInt(valor);
   if ((nume != valor)){
	//alert("Introduzca un número");
	return(false);
   }
   return(true);
}

function Decimal(valor){
	valor = valor.replace(",",".");
	num = parseFloat(valor)
	if (num!=valor){
		return(false)
	} else {
		return(true)
	}
}

function SonDigitos(cadena){
	var longitud = cadena.length
	var i
	var numero
	var ok=true
	i=0
	while ((i<longitud)&& (OK=true)) {
		numero=parseInt(cadena.charAt(i));		
		if (!(numero>=0 && numero<=9)){
			ok=false	
		}   
		i++;
	}
	return(ok)
}


function Requerido(objField, FieldName)
{
	var strField = new String(objField.value);
	if (EnBlanco(strField)) {
		alert("Debe introducir " + FieldName);
		objField.focus();
		//objField.select();
		return false;
	}

	return true;
}

function esFichero()
/*	Devuelve true si el Fichero tiene la extensión que se pasa como parámetro
	 Devuelve false en cualquier otro caso */
{
	var cadena,res,extensiones,i;
	
	extensiones = esFichero.arguments;
	cadena = extensiones[0];
	cadena = cadena.toUpperCase();
	res = false;
	for (i=1;i < extensiones.length; i++)
	{ 
		if (cadena.indexOf("."+ extensiones[i]) != -1 )
		{
			res = true;		
		}
	}
	return (res);
}

function formatNum(num, numDecs) {
var valor
	num = num.toString().replace(/\$|\,/g,'');
	if(isNaN(num))
		num = "0";
	
	sign = (num == (num = Math.abs(num)));
	num = Math.floor(num*100+0.50000000001);
	cents = num%100;
	num = Math.floor(num/100).toString();
	
	if(cents<10)
		cents = "0" + cents;
	
	for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
		num = num.substring(0,num.length-(4*i+3))+'.'+ num.substring(num.length-(4*i+3));
	
	valor=((sign)?'':'-') + num
	if (numDecs > 0)
		valor = valor + ',' + cents
		
	return (valor);
}

function StrReplace( str1, str2, str3) {
  return str1.toString().replace(str2, str3);
}

//Comprueba que un NIF sea correcto.
function NIF(strNif)
{
	var arrLetra = new Array('T','R','W','A','G','M','Y','F','P','D','X','B','N','J','Z','S','Q','V','H','L','C','K','E');

	if (strNif.length < 9) return false;
	
	
	var n = strNif.substring(0, 8);
	if (isNaN(Number(n))) return false;
		 
	var l = strNif.substring(8, 9);
	var letra = l.charCodeAt(0);
	if (!(letra >= 65 && letra <= 90)) return false;
	var position =Number(n)%23;
	if (arrLetra[position] != l) return false;
	
	return true;
}	


//Comprueba que un NIE sea correcto. X1000000Z
function NIE(strNie)
{
	if (strNie.length < 9) return false;
	var x = strNie.substring(0,1);
	if (x != 'X') return false;
	var nif = "0" + strNie.substring(1,strNie.length);
	return NIF(nif);
}

function CIF(texto)
{
	var pares = 0;
	var impares = 0;
	var suma;
	var ultima;
	var unumero;
	var uletra = new Array("J", "A", "B", "C", "D", "E", "F", "G", "H", "I");
	var xxx;
	
	texto = texto.toUpperCase();
	
	var regular = new RegExp(/^[ABCDEFGHKLMNPQS]\d\d\d\d\d\d\d[0-9,A-J]$/g);
	 if (!regular.exec(texto)) return false;
		 
	 ultima = texto.substr(8,1);
	
	 for (var cont = 1 ; cont < 7 ; cont ++){
		 xxx = (2 * parseInt(texto.substr(cont++,1))).toString() + "0";
		 impares += parseInt(xxx.substr(0,1)) + parseInt(xxx.substr(1,1));
		 pares += parseInt(texto.substr(cont,1));
	 }
	 xxx = (2 * parseInt(texto.substr(cont,1))).toString() + "0";
	 impares += parseInt(xxx.substr(0,1)) + parseInt(xxx.substr(1,1));
	 
	 suma = (pares + impares).toString();
	 unumero = parseInt(suma.substr(suma.length - 1, 1));
	 unumero = (10 - unumero).toString();
	 if(unumero == 10) unumero = 0;
	 
	 if ((ultima == unumero) || (ultima == uletra[unumero]))
		 return true;
	 else
		 return false;
} 

function FCKEditorVacio(nombreControl)
{
	if(FCKeditorAPI.GetInstance(nombreControl).GetXHTML() == "") 
		return true;
	else
		return false;
}

function hayJS()
{
	return 'enabled';
}