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

/**
 * DHTML date validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
 */
// Declaring valid date character, minimum year and maximum year
//var dtCh= "/";
var dtCh= "-";
var minYear=1900;
var maxYear=2100;

function isInteger(s){
   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 día de la fecha no parece correcto")
		//return false
		return 3;
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		//alert("El año 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 ValidateForm(){
	var dt=document.frmSample.txtDate
	if (isDate(dt.value)==false){
		dt.focus()
		return false
	}
    return true
 }

*/




function isEmpty(str){ 
    //strRE = new RegExp( ); 
    //strRE.compile( '^[\s ]*$', 'gi' ); 
    //return strRE.test( str.value ); 
   var str = (typeof(str) == "object") ? str.value : str ; 
	if(str == '')
		return true;
	
	return false;
} 

function NOTEmpty(str){ 
    //strRE = new RegExp( ); 
    //strRE.compile( '^[\s ]*$', 'gi' ); 
    //return strRE.test( str.value ); 
   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 ; 
	
	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(o)
{
	return o.value.match(/^[0-9]{5}/i);
}

function isNum(o)
{
	return o.value.match(/^[0-9]/i);
	//return o.value.match(/^\d{4,}/i);
}

function isChecked(o)
{
	return (o.checked) ? true : false ;
}

function isRadioChecked(o)
{
	for(i=0; i<o.length; i++)
	{
		if(o[i].checked)
			return true;
	}
	return false ;
}


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	tagName		El nombre del objeto (input)
 *	@param	newClass		La class que tenemos que aplicar
 ************************************************/
function change(tagName, newClass) 
{
	//identity=document.getElementById(id);
	identity=document.getElementsByName(tagName)[0];
	identity.className=newClass;
}