function chkDate()
{
    var i, field, p, name, errors, not_date;
    not_date = 0;
    errors 	= chkDate.arguments[0];
	msg 	= chkDate.arguments[1];
    for ( i = 2; i < chkDate.arguments.length; i += 2) {
        field = chkDate.arguments[i];
        name = chkDate.arguments[i+1];
        if (field.value) {
            isplit = field.value.indexOf('/');
            if (isplit == -1 || isplit == field.value.length)
            not_date = 1;
            sDay = field.value.substring(0, isplit);
            isplit = field.value.indexOf('/', isplit + 1);
            if (isplit == -1 ||  (isplit + 1 )  == field.value.length)
                not_date = 1;
            sMonth = field.value.substring((sDay.length + 1), isplit);
            sYear = field.value.substring(isplit + 1);
            if ( !CheckInteger(sMonth) )
                not_date = 1;
            else if ( !CheckRange(sMonth, 1, 12) )
                not_date = 1;
            else if ( !CheckInteger(sYear))
                not_date = 1;
            else if ( !CheckRange(sYear, 0, null) )
                not_date = 1;
			else if ( sYear.length != 4 && sYear.length !=2 )
				not_date = 1;
            else if ( !CheckInteger(sDay) )
                not_date = 1;
            else if ( !CheckDay(sYear, sMonth, sDay) )
                not_date = 1;

			if (not_date)
                errors += '- '+ name + ': ' + msg + '.\n';
        }
    }
    return errors;
}

function 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 CheckRange(checkDay, 1, maxDay);
}

function CheckInteger(object_value)
{
    var decimal_format = ".";
    var check_char;
    if (object_value.length == 0)
        return true;
    check_char = object_value.indexOf(decimal_format)
    if (check_char < 1)
        return CheckNumber(object_value);
    else
        return false;
}

function NumberRange(object_value, min_value, max_value)
{
    if (min_value != null)
        if (object_value < min_value)
            return false;
    if (max_value != null)
        if (object_value > max_value)
            return false;
    return true;
}

function CheckRange(object_value, min_value, max_value)
{
    if (object_value.length == 0)
        return true;
    if (!CheckNumber(object_value))
        return false;
    else
        return (NumberRange((eval(object_value)), min_value, max_value));
    return true;
}

function CheckNumber(object_value)
{
    var start_format = " .+-0123456789";
    var number_format = " .0123456789";
    var check_char;
    var decimal = false;
    var trailing_blank = false;
    var digits = false;

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

    check_char = start_format.indexOf(object_value.charAt(0))
    if (check_char == 1)
        decimal = true;
    else if (check_char < 1)
        return false;
    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)
                return false;
            else
                decimal = true;
        }
        else if (check_char == 0)
        {
            if (decimal || digits)	
            trailing_blank = true;
        }
        else if (trailing_blank)
            return false;
        else
            digits = true;
    }	
    return true
}