function _SE_CheckEMail(form_object, input_object, object_value)
  {
    var i = 0;
    var uno = 0;
	var due = 0;
	var tre = 0;
	var c = object_value.charAt (0);
	var retval = false;
	// Is there a leading char??
	if ((c != ' ') && (c != '\n') && (c != '\t') && (c != '.') && (c != '@'))
	  uno = 1;
	// Is there a '@'??
	for (i = 0; i < object_value.length; i++)
	{
	  if (object_value.charAt (i) == '@')
	    due++;
	}
	// Is there a '.' in the right position??
	if ((object_value.charAt (object_value.length - 3) == '.')
     || (object_value.charAt (object_value.length - 4) == '.')
     || (object_value.charAt (object_value.length - 5) == '.'))
      tre = 1;
	if ((uno == 1) && (due == 1) && (tre == 1))
	  retval = true;
	return retval;
  }




function _CF_onError(form_object, input_object, object_value, error_message)
    {
	alert(error_message);
       	return false;	
    }



function _CF_hasValue(obj, obj_type)
    {
    if (obj_type == "TEXT" || obj_type == "PASSWORD")
	{
    	if (obj.value.length == 0) 
      		return false;
    	else 
      		return true;
    	}
    else if (obj_type == "SELECT")
	{
        for (i=0; i < obj.length; i++)
	    	{
		if (obj.options[i].selected)
			return true;
		}

       	return false;	
	}
    else if (obj_type == "SINGLE_VALUE_RADIO" || obj_type == "SINGLE_VALUE_CHECKBOX")
	{

		if (obj.checked)
			return true;
		else
       		return false;	
	}
    else if (obj_type == "RADIO" || obj_type == "CHECKBOX")
	{

        for (i=0; i < obj.length; i++)
	    	{
		if (obj[i].checked)
			return true;
		}

       	return false;	
	}
	}



function _CF_checkeurodate(object_value)
    {
    //Returns true if value is a eurodate format or is NULL
    //otherwise returns false	

    if (object_value.length == 0)
        return true;

    //Returns true if value is a date in the dd/mm/yyyy format
	isplit = object_value.indexOf('/');

	if (isplit == -1)
	{
		isplit = object_value.indexOf('.');
	}

	if (isplit == -1 || isplit == object_value.length)
		return false;

    sDay = object_value.substring(0, isplit);

	monthSplit = isplit + 1;

	isplit = object_value.indexOf('/', monthSplit);

	if (isplit == -1)
	{
		isplit = object_value.indexOf('.', monthSplit);
	}

	if (isplit == -1 ||  (isplit + 1 )  == object_value.length)
		return false;

    sMonth = object_value.substring((sDay.length + 1), isplit);

	sYear = object_value.substring(isplit + 1);

	if (!_CF_checkinteger(sMonth)) //check month
		return false;
	else
	if (!_CF_checkrange(sMonth, 1, 12)) // check month
		return false;
	else
	if (!_CF_checkinteger(sYear)) //check year
		return false;
	else
	if (!_CF_checkrange(sYear, 0, null)) //check year
		return false;
	else
	if (!_CF_checkinteger(sDay)) //check day
		return false;
	else
	if (!_CF_checkday(sYear, sMonth, sDay)) //check day
		return false;
	else
		return true;
    }



function _CF_checkday(checkYear, checkMonth, checkDay)
    {

	maxDay = 31;

	if (checkMonth == 4 || checkMonth == 6 ||
			checkMonth == 9 || checkMonth == 11)
		maxDay = 30;
	else
	if (checkMonth == 2)
	{
		if (checkYear % 4 > 0)
			maxDay =28;
		else
		if (checkYear % 100 == 0 && checkYear % 400 > 0)
			maxDay = 28;
		else
			maxDay = 29;
	}

	return _CF_checkrange(checkDay, 1, maxDay); //check day
    }



function _CF_checkinteger(object_value)
    {
    //Returns true if value is a number or is NULL
    //otherwise returns false	

    if (object_value.length == 0)
        return true;

    //Returns true if value is an integer defined as
    //   having an optional leading + or -.
    //   otherwise containing only the characters 0-9.
	var decimal_format = ".";
	var check_char;

    //The first character can be + -  blank or a digit.
	check_char = object_value.indexOf(decimal_format)
    //Was it a decimal?
    if (check_char < 1)
	return _CF_checknumber(object_value);
    else
	return false;
    }



function _CF_numberrange(object_value, min_value, max_value)
    {
    // check minimum
    if (min_value != null)
	{
        if (object_value < min_value)
		return false;
	}

    // check maximum
    if (max_value != null)
	{
	if (object_value > max_value)
		return false;
	}
	
    //All tests passed, so...
    return true;
    }



function _CF_checknumber(object_value)
    {
    //Returns true if value is a number or is NULL
    //otherwise returns false	

    if (object_value.length == 0)
        return true;

    //Returns true if value is a number defined as
    //   having an optional leading + or -.
    //   having at most 1 decimal point.
    //   otherwise containing only the characters 0-9.
	var start_format = " .+-0123456789";
	var number_format = " .0123456789";
	var check_char;
	var decimal = false;
	var trailing_blank = false;
	var digits = false;

    //The first character can be + - .  blank or a digit.
	check_char = start_format.indexOf(object_value.charAt(0))
    //Was it a decimal?
	if (check_char == 1)
	    decimal = true;
	else if (check_char < 1)
		return false;
        
	//Remaining characters can be only . or a digit, but only one decimal.
	for (var i = 1; i < object_value.length; i++)
	{
		check_char = number_format.indexOf(object_value.charAt(i))
		if (check_char < 0)
			return false;
		else if (check_char == 1)
		{
			if (decimal)		// Second decimal.
				return false;
			else
				decimal = true;
		}
		else if (check_char == 0)
		{
			if (decimal || digits)	
				trailing_blank = true;
        // ignore leading blanks

		}
	        else if (trailing_blank)
			return false;
		else
			digits = true;
	}	
    //All tests passed, so...
    return true
    }



function _CF_checkrange(object_value, min_value, max_value)
    {
    //if value is in range then return true else return false

    if (object_value.length == 0)
        return true;


    if (!_CF_checknumber(object_value))
	{
	return false;
	}
    else
	{
	return (_CF_numberrange((eval(object_value)), min_value, max_value));
	}
	
    //All tests passed, so...
    return true;
    }

// #########################################################

function  _CF_checkcontactform(_CF_this)
    {

    if  (!_CF_hasValue(_CF_this.nome, "TEXT" )) 
        {
        if  (!_CF_onError(_CF_this, _CF_this.nome, _CF_this.nome.value, "Il campo NOME non deve essere omesso!"))
            {
            return false; 
            }
        }

    if  (!_CF_hasValue(_CF_this.cognome, "TEXT" )) 
        {
        if  (!_CF_onError(_CF_this, _CF_this.cognome, _CF_this.cognome.value, "Il campo COGNOME non deve essere omesso!"))
            {
            return false; 
            }
        }

    if  (!_CF_hasValue(_CF_this.email, "TEXT" ) && !_CF_hasValue(_CF_this.telefono, "TEXT" )) 
        {
        if  (!_CF_onError(_CF_this, _CF_this.email, _CF_this.email.value, "Si prega di inserire almeno uno tra indirizzo e-mail e nº di telefono."))
            {
            return false; 
            }
        }
     else
        {
        if  (_CF_hasValue(_CF_this.telefono, "TEXT" ) && !_CF_checkeurodate(_CF_this.giorno.value))
            {
            if  (!_CF_onError(_CF_this, _CF_this.giorno, _CF_this.giorno.value, "Il campo GIORNO deve contenere solo valori numerici costituenti una data valida (gg/mm/aaaa)!"))
                {
                return false; 
                }
            }
        if  (_CF_hasValue(_CF_this.email, "TEXT" ) && !_SE_CheckEMail(_CF_this, _CF_this.email, _CF_this.email.value))
            {
            if  (!_CF_onError(_CF_this, _CF_this.giorno, _CF_this.giorno.value, "L'indirizzo e-mail inserito non sembra essere valido."))
                {
                return false; 
                }
            }
        }

    if  (!_CF_this.consenso[0].checked)
        {
        if  (!_CF_onError(_CF_this, _CF_this.consenso, _CF_this.consenso.value, "Non è possibile continuare se non si dà il proprio consenso al trattamento dei dati inviati."))
            {
            return false; 
            }
        }
    return true;

    }