/****************************************
*
* Verificar los campos de un formulario
*
*
*HELP
*
*if(isEmpty(o.FORM_direccion))
*    alert('El campo direcci�n no puede quedar vacio\n');
*
*
****************************************/

//var dtCh= "/";
var dtCh= "-";
var minYear=1900;
var maxYear=2100;

function isInteger(s){
   /*
    * No borrar
    */
    var s = (typeof(s) == "object") ? s.value : s ;
    var i;
    for (i = 0; i < s.length; i++){
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}


function stripCharsInBag(s, bag){
    var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function daysInFebruary (year){
    // February has 29 days in any year evenly divisible by four,
  // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
    for (var i = 1; i <= n; i++) {
        this[i] = 31
        if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
        if (i==2) {this[i] = 29}
   }
   return this
}

function isDate(dtStr){
   dtStr = (typeof(dtStr) == "object") ? dtStr.value : dtStr ;
    var daysInMonth = DaysArray(12)
    var pos1=dtStr.indexOf(dtCh)
    var pos2=dtStr.indexOf(dtCh,pos1+1)
    var strDay=dtStr.substring(0,pos1)
    var strMonth=dtStr.substring(pos1+1,pos2)
    var strYear=dtStr.substring(pos2+1)
    strYr=strYear
    //alert(pos1+', '+pos2+', '+strDay+', '+strMonth+', '+strYear);
    if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
    if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
    for (var i = 1; i <= 3; i++) {
        if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
    }
    month=parseInt(strMonth)
    day=parseInt(strDay)
    year=parseInt(strYr)
    if (pos1==-1 || pos2==-1){
        //alert("El formato de la fecha tiene que ser el siguiente: dd/mm/aaaa")
        //return false
        return 1;
    }
    if (strMonth.length<1 || month<1 || month>12){
        //alert("El mes de la fecha no parece correcto")
        //return false
        return 2;
    }
    if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
        //alert("El d�a de la fecha no parece correcto")
        //return false
        return 3;
    }
    if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
        //alert("El a�o de la fecha tiene que ser entre "+minYear+" y "+maxYear+" y con 4 digitos")
        //return false
        return 4;

    }
    if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
        //alert("La fecha no parece correcta")
        //return false
        return 5;
    }
    //return true
    return 0;
}

function isEmpty(str){
   var str = (typeof(str) == "object") ? str.value : str ;
    if(str == '')
        return true;

    return false;
}

function notValidEmail(str){
   var str = (typeof(str) == "object") ? str.value : str ;
	str = str.replace(/^\s*|\s*$/g,"");	// Trim
    if(str == '')            // Si el string esta vacio no devolvemos error
        return false;

    mailRE = new RegExp( );
    mailRE.compile( '^[\._a-z0-9-]+@[\.a-z0-9-]+[\.]{1}[a-z]{2,4}$', 'gi' );
    return !(mailRE.test( str ));
}

function notSelected(o)
{
    return (o.selectedIndex == 0);
}

/*
function notSelectedArray(o)
{
    return (o.selectedIndex == -1) ? true : false ;
}
*/

function isCodigoPostal(cp)
{
    var cp = (typeof(cp) == "object") ? cp.value : cp ;
    return cp.match(/^[0-9]{5}/i);
}

function isNum(num)
{
    //var num = (typeof(num) == "object") ? num.value : num ;
    //return num.match(/^[0-9]/i);
    var num = (typeof(num) == "object") ? num.value : num ;
    var i;
    for (i = 0; i < num.length; i++){
        // Check that current character is number.
        var c = num.charAt(i);
        if (((c < "0") || (c > "9")) && (c != ".") && (c != ",")) return false;
    }
    // All characters are numbers.
    return true;

}

function isString(s)
{
    var s = (typeof(s) == "object") ? s.value : s ;
    return typeof s == 'string';
}

// s tiene solo letras y numeros
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 isChecked(tagId, my_class)
{
    //var o = (typeof(o) == "object") ? str.value : str ;
    //alert(typeof(o)+' '+o.name);

    var o = eval('document.MyForm.'+tagId);
    var checked = false;
    /*
     * Miramos si hay varios RadioButton
     */
    var len = o.length;

    if(typeof(len) == 'undefined'){

        o.className = my_class;
        if(o.checked){
            o.className = '';
            checked = true;
        }

    }else{

        /*
         * Buscamos si uno esta checkeado
         */
        for(var i=0; i<len; i++){
        //alert(o[i]);
            o[i].className = '';
            if(o[i].checked){
                checked = true;
            }
        }

        /*
         * Si ninguno esta checkeado cambiamos de color
         */
        if(!checked){
            for(var i=0; i<len; i++){
                o[i].className = my_class;
            }
        }
    }

    return checked;
}


function thisLen(str, theLen){

   var str = (typeof(str) == "object") ? str.value : str ;
    if(str.length != theLen)
        return false;

    return true;
}


function isMinLen(str, theLen){

   var str = (typeof(str) == "object") ? str.value : str ;
    if(str.length < theLen)
        return false;

    return true;
}


function isMaxLen(str, theLen){

   var str = (typeof(str) == "object") ? str.value : str ;
    if(str.length > theLen)
        return false;

    return true;
}


/*
 *    Quita los espacios delante y detrace de una string
 ******************************************************/
function trimAll(s)
{
   var s = (typeof(s) == "object") ? s.value : s ;

    while (s.substring(0,1) == ' ')
        s = s.substring(1, s.length);

    while (s.substring(s.length-1, s.length) == ' ')
        s = s.substring(0,s.length-1);

    return s;
}


/*
 *    Cambia la class de un objeto del formulario
 *
 *    @param    tagId           El id del objeto
 *    @param    newClass        La class que tenemos que aplicar
 ************************************************/
//function changeClassName(tagName, newClass)
function changeClassName(tagId, newClass)
{
    identity=document.getElementById(tagId);
    //identity=document.getElementsByName(tagName)[0];
    identity.className=newClass;
}


/*
 *    Devuelve el nombre de la class de un objeto del formulario
 *
 *    @param    tagId           El Id del objeto
 ************************************************/
function getClassName(tagId)
{
    identity=document.getElementById(tagId);
    //identity=document.getElementsByName(tagName)[0];
    return identity.className;
}


/*
 *    Devuelve el nombre de un objeto del formulario
 *
 *    @param    tagId        El ID del objeto
 ************************************************/
//function getTagName(tagName)
function getTagId(tagId)
{
    if(typeof(tagId) != "object"){
       return false;
    }
    identity=document.getElementById(tagId);
    //identity=document.getElementsByName(tagName)[0];
    return identity.id;
    //return identity.name;
}

/*
 * implode igual que en PHP
 ******************************************************/
function implode(arr, separator) {
    fixedImplode = "";
    separator = new String(separator);
    if (separator == "undefined") { separator = " "; }
    for (x = 0; x < arr.length; x++) { fixedImplode += (separator + String(arr[x])); }

    fixedImplode =
        fixedImplode.substring(separator.length,
        fixedImplode.length);
    return fixedImplode;
}

/*
 * str_replace igual que en PHP
 ***************************************************/
function str_replace(search, replace, str) {
    return str.split(search).join(replace);
}