// VALIDATION.JS

var CHECK_FOR_LENGTH	= 0x01 ;
var CHECK_FOR_NUMERIC	= 0x02 ;
var CHECK_FOR_EMAIL		= 0x04 ;
var CHECK_FOR_VALIDNAME	= 0x08 ;
var CHECK_FOR_DATE		= 0x10 ;
var CHECK_FOR_FILENAME	= 0x20 ;
var ALLOW_BLANK			= 0x40 ;
var CHECK_FOR_BOOLEAN	= 0x80 ;
var CHECK_FOR_TIME		= 0x100 ;


var Controlar = new Array() ;
var Fechas_Falsas = new Array(5) ;
Fechas_Falsas[0] = "3002"
Fechas_Falsas[1] = "3102"  
Fechas_Falsas[2] = "3104"
Fechas_Falsas[3] = "3106"
Fechas_Falsas[4] = "3109"
Fechas_Falsas[5] = "3111"

// Constructor
function ElementoDeControl( field, options, min, max, msg )
{
	this.field	= field ;
	this.options= options ;
	this.min	= min ;
	this.max	= max ;

	if ( ! msg || msg.length == 0 )
		this.msg = new String ( "El valor de '" + field.name + "'\n no es válido")
	else
		this.msg	= msg ;
}

function ValidateField( obj )
{
with ( obj )
{
	if ( options & ALLOW_BLANK )
	{
		if ( obj.field.value.length == 0 )
			return false ;
	}
	
	if ( options & CHECK_FOR_LENGTH )
	{
		if ( CheckForLength (obj) )
			return 1 ;
	}

	if ( options & CHECK_FOR_EMAIL )
	{
		if (CheckForEMail (obj)) 
			return 1;
	}

	if ( options & CHECK_FOR_NUMERIC )
	{
		if (CheckForNumeric (obj))
			return 1;
	}

	if ( options & CHECK_FOR_DATE )
	{
		if (CheckForDate (obj))
			return 1;
	}
	
	if ( options & CHECK_FOR_VALIDNAME )
	{
		if (CheckForValidName (obj))
			return 1;
	}		

	if ( options & CHECK_FOR_FILENAME )
	{
		if (CheckForFileName (obj))
			return 1;
	}		

	if ( options & CHECK_FOR_BOOLEAN )
	{
		if (CheckForBoolean (obj))
			return 1;
	}	
	
	if ( options & CHECK_FOR_TIME )
	{
		if (CheckForTime (obj))
			return 1;
	}	

}
return false ;
}

function ValidateAllFields ()
{
	var xxx ;
	for ( xxx = 0 ; xxx < Controlar.length ; xxx++ )
	{
		if ( ValidateField ( Controlar[xxx] ) ) 
		{
			MensajeError ( Controlar[xxx], xxx ) ;
			return true ;
		}
	}
	return false ;
}

// Mensaje de error
function MensajeError ( obj, index )
{
	var prevObj ;

	alert ( obj.msg ) ;

	if ( obj.field.type == "hidden" )
	{
		for ( obj = Controlar[index-1] ; index && obj.field.type == "hidden" ; index-- ) ;
		if ( obj.field.type == "hidden" )
			obj= null ;
	}

	if ( obj )
		obj.field.focus() ;
}

function AddValidationItem (field, CHECK, min, max, msg)
{
	var xxx = Controlar.length ;
	Controlar[xxx] = new ElementoDeControl(field, CHECK, min, max, msg) ;

}

function ResetValidationItems ()
{
	var xxx ;
	for ( xxx = 0 ; xxx < Controlar.length ; xxx++ )
		delete Controlar[xxx];
	Controlar.length = 0;
}

function CheckForLength ( obj )
{
	var text ;

	if ( obj & CHECK_FOR_NUMERIC )
		return false ; // incompatible options

	text = doTrim ( obj.field.value ) ;

	with ( obj )
	{
		if ( min != -1 )
		{
			if ( text.length < min )
				return true ;
		}
		if ( max != -1 )
		{
			if ( text.length > max)
				return true ;
		}
	}
	return false ;
}

function CheckForEMail (obj)
{
	var str			= obj.field.value ;
	var narrobas	= 0
	var npuntos		= 0 
	
	str = str.toLowerCase()
	index = str.indexOf ('@', 0)

	if ( index < 1)
	{
		return 1;
	}
	
	else if (str.indexOf("..",0) != -1 )
	{
		return 1 ;
	}
	else
	{
		nombre = str.substring(0,index)
		host = str.substring(index+1,str.length)
		if ( host.indexOf ('.', 0) <= 0 || nombre.indexOf('.', 0) == 0 )
		{
			return 1;
		}
		
		if ( nombre.charAt(nombre.length-1) == '.' || host.charAt(host.length-1) == '.' )
		{
			return 1;
		}
		
		// Busca caracteres invalidos en el nombre del email
		for( xxx = 0 ; xxx < nombre.length ; xxx++ )
		{
			var chrCode = nombre.charCodeAt(xxx) ;
			test =	checkRange(chrCode,45,46) ||
					checkRange(chrCode,48,57) || 
					checkRange(chrCode,95,95) || 
					checkRange(chrCode,97,122) || 
					checkRange(chrCode,126,126);
			if (!test)
				return 1;
		}

		// Busca caracteres invalidos en el nombre del host
		for( xxx = 0 ; xxx < host.length ; xxx++ )
		{
			var chrCode = host.charCodeAt(xxx) ;
			test =	checkRange(chrCode,45,46) ||
					checkRange(chrCode,48,57) || 
					checkRange(chrCode,95,95) || 
					checkRange(chrCode,97,122) || 
					checkRange(chrCode,126,126);
			if (!test)
				return 1;
		}
	}
	
	return false ;
}


function checkRange (value,min,max)
{
	return (value >= min && value <= max);

}

function CheckForNumeric (obj)
{
	with(obj){

		if ( field.value.length == 0 || isNaN(field.value) )
		{
		return 1 ;
		}
		if ( min != -1 )
		{
			if ( parseFloat(field.value) < min )
				return true ;
		}
		if ( max != -1 )
		{
			if ( parseFloat(field.value) > max )
				return true ;
		}
		
		//if( parseFloat(field.value) < min || parseFloat(field.value) > max )
		//return 1 ;
	}
	return false ;
}

function CheckForBoolean (obj)
{
	with(obj){

		if( parseFloat(field.value) != min )
		return 1 ;
	}
	return false ;
}

function CheckForDate (obj)
{
	with(obj){
		var day = parseInt(obj.field.value.substring(0,2),10) ;
		var month = parseInt(obj.field.value.substring(2,4),10) ;
		var year = parseInt(obj.field.value.substring(4),10) ;
		 
		if ( obj.field.value.length != 8 || isNaN(field.value) )
			return 1 ;

		if ( day > 31 || day <= 0 )
			return 1 ;
							
		if ( month > 12 || month <= 0 )
			return 1 ;
			
		if ( year <= 0 )
			return 1 ;
			
		for( xxx = 0 ; xxx < Fechas_Falsas.length ; xxx++ )
		{	
			if ( Fechas_Falsas[xxx].substring(0,2) == day && 
				Fechas_Falsas[xxx].substring(2,4) == month )
				return 1 ;
		}
	
		if( day == 29 && month == 2 && !checkBisiesto(year) )
			return 1 ;
	}
	return false ;
}	

function checkBisiesto(year)
{
	return ( year%4 == 0 ) ;
}

function CheckForValidName (obj)
{

	var str = obj.field.value ;

	if ( obj.field.value.length == 0 )
	return 1 ;

	for( xxx = 0 ; xxx < str.length ; xxx++ )
	{
		var chrCode = str.charAt(xxx).charCodeAt() ;
		if ( (chrCode < 48 && str.charAt(xxx) != '-' && str.charAt(xxx) != '.') || 
			 (chrCode > 57 && chrCode < 65) || 
			 (chrCode > 90 && chrCode < 97 && str.charAt(xxx) != '_') ||
			  chrCode > 122 )
			return 1 ;
			
	}
	return false ;
}

function CheckForFileName (obj)
{

	if ( obj.field.value.length == 0 )
	return 1 ;

	var str = obj.field.value ;
	
	if ( str.indexOf('"',0) != -1 || str.indexOf('*',0) != -1 || 
		 str.indexOf(':',0) != -1 || str.indexOf('/',0) != -1 || 
		 str.indexOf('<',0) != -1 || str.indexOf('>',0) != -1 ||
		 str.indexOf('?',0) != -1 || str.indexOf('|',0) != -1 ||
		 str.indexOf('\\',0) != -1 )
		 return 1;
	
	for( xxx = 0 ; xxx < str.length ; xxx++ )
	{
		var chrCode = str.charAt(xxx).charCodeAt() ;
	
		if (chrCode < 32 && chrCode > 126 )
			return 1 ;
	}
	return false ;
}

function CheckForTime (obj)
{
	with(obj){

		var horas, minutos, segundos
		var str = obj.field.value ;
		
		index = str.indexOf (':', 0 )
		if ( index < 1) return 1;
		
		horas = str.substring(0,index)
		index2 = str.indexOf (':', index+1 )
		
		if ( index2 == -1 ) {
			minutos = str.substring(index+1,str.length)
		}
		else
		{	
			minutos = str.substring(index+1,index2)
			segundos = str.substring(index2+1,str.length)
		}	
		
		if ( horas.length == 0 || parseInt(horas) > 12 || parseInt(horas) < 1)
			return true ;

		if ( minutos.length != 2 || parseInt(minutos) > 59 || parseInt(minutos) < 0)
			return true ;
		
		if ( parseInt(segundos) > 59 || parseInt(segundos) < 0)
			return true ;		
		
		if ( index2 > 0 && segundos.length != 2 )
			return true ;		
			
	
	}
	return false ;
}

function doTrim( str )
{
	var begin, end, retStr, length, index ;
	
	length = str.length ;

	for( index = 0 ; index < length && str.charAt(index)==" "; index++ ) ;
	
	if ( index == str.length )
		length = 0 ;
	else
		begin = index ;

	for( index = length-1 ; index >= 0 && str.charAt(index)==" "; index-- ) ;
	
	if ( index == -1 )
		retStr = "" ;
	else
		retStr = str.substring( begin, index + 1)

	return retStr ;
}