function _validate_hasValue(obj, obj_type) {
    if (obj_type.toUpperCase() == "TEXT" || obj_type.toUpperCase() == "PASSWORD") {
        if (obj.value.length == 0)
            return false;
        else
            return true;
    } else if (obj_type.toUpperCase() == "SELECT") {
        for (i=0; i < obj.length; i++) {
            if (obj.options[i].selected)
                return true;
        }
        return false;
    } else if (obj_type.toUpperCase() == "RADIO" ||
               obj_type.toUpperCase() == "CHECKBOX") {
        if (obj.checked) {
            return true;
        } else {
            if (obj.length > 1) {
                for (i=0; i < obj.length; i++) {
                    if (obj[i].checked)
                        return true;
                }
            }
            return false;
        }
    }
}
function _validate_checknumber(obj_val) {
    if (obj_val.length == 0)
        return true;
    var start_format = " .+-0123456789";
    var number_format = " .0123456789 ";
    var check_char;
    var decimal = false;
    var trailing_blank = false;
    var digits = false;
    check_char = start_format.indexOf(obj_val.charAt(0));
    if (check_char == 1)
        decimal = true;
    else if (check_char < 1)
        return false;
    for (var i = 1; i < obj_val.length; i++) {
        check_char = number_format.indexOf(obj_val.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;
}
function _validate_checkinteger(obj_val) {
    if (obj_val.length == 0)
        return true;
    var decimal_format = ".";
    var check_char;
    check_char = obj_val.indexOf(decimal_format);
    if (check_char < 1)
        return _validate_checknumber(obj_val);
    else
        return false;
}
function _validate_checkcreditcard(obj_val) {
    var white_space = " -";
    var creditcard_string="";
    var check_char;
    if (obj_val.length == 0)
        return true;
    for (var i = 0; i < obj_val.length; i++) {
        check_char = white_space.indexOf(obj_val.charAt(i))
        if (check_char < 0)
            creditcard_string += obj_val.substring(i, (i + 1));
    }
    if (creditcard_string.length == 0)
        return false;
    if (creditcard_string.charAt(0) == "+")
        return false;
    if (!_validate_checkinteger(creditcard_string))
        return false;
    var doubledigit = creditcard_string.length % 2 == 1 ? false : true;
    var checkdigit = 0;
    var tempdigit;
    for (var i = 0; i < creditcard_string.length; i++) {
        tempdigit = eval(creditcard_string.charAt(i));
        if (doubledigit) {
            tempdigit *= 2;
            checkdigit += (tempdigit % 10);
            if ((tempdigit / 10) >= 1.0) {
                checkdigit++;
            }
            doubledigit = false;
        } else {
            checkdigit += tempdigit;
            doubledigit = true;
        }
    }
    return (checkdigit % 10) == 0 ? true : false;
}
function _validate_numberrange(obj_val, min_value, max_value) {
    if (min_value != null) {
        if (obj_val < min_value)
            return false;
    }
    if (max_value != null) {
        if (obj_val > max_value)
            return false;
    }
    return true;
}
function _validate_checkrange(obj_val, min_val, max_val) {
    if (obj_val.length == 0)
        return true;
    if (!_validate_checknumber(obj_val)) {
        return false;
    } else {
        return (_validate_numberrange((eval(obj_val)), min_val, max_val));
    }
    return true;
}
function _validate_checkdate(obj_val) {
    if (obj_val.length == 0)
        return true;
    isplit = obj_val.indexOf('/');
    if (isplit == -1 || isplit == obj_val.length)
        return false;
    sMonth = obj_val.substring(0, isplit);
    isplit = obj_val.indexOf('/', isplit + 1);
    if (isplit == -1 || (isplit + 1 ) == obj_val.length)
        return false;
    sDay = obj_val.substring((sMonth.length + 1), isplit);
    sYear = obj_val.substring(isplit + 1);
    if (!_validate_checkinteger(sMonth)) //check month
        return false;
    else if (!_validate_checkrange(sMonth, 1, 12)) //check month
        return false;
    else if (!_validate_checkinteger(sYear)) //check year
        return false;
    else if (!_validate_checkrange(sYear, 1000, 9999)) //check year
        return false;
    else if (!_validate_checkinteger(sDay)) //check day
        return false;
    else if (!_validate_checkday(sYear, sMonth, sDay)) // check day
        return false;
    else
        return true;
}
function _validate_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 _validate_checkrange(checkDay, 1, maxDay); //check day
}
function _validate_checkeurodate(obj_val) {
    if (obj_val.length == 0)
        return true;
    isplit = obj_val.indexOf('/');
    if (isplit == -1 || isplit == obj_val.length)
        return false;
    sDay = obj_val.substring(0, isplit);
    isplit = obj_val.indexOf('/', isplit + 1);
    if (isplit == -1 ||  (isplit + 1 )  == obj_val.length)
        return false;
    sMonth = obj_val.substring((sDay.length + 1), isplit);
    sYear = obj_val.substring(isplit + 1);
    if (!_validate_checkinteger(sMonth))
        return false;
    else if (!_validate_checkrange(sMonth, 1, 12))
        return false;
    else if (!_validate_checkinteger(sYear))
        return false;
    else if (!_validate_checkrange(sYear, 0, null))
        return false;
    else if (!_validate_checkinteger(sDay))
        return false;
    else if (!_validate_checkday(sYear, sMonth, sDay))
        return false;
    else
        return true;
}
function _validate_checkssc(obj_val) {
    var white_space = " -+.";
    var ssc_string="";
    var check_char;
    if (obj_val.length == 0)
        return true;
    if (obj_val.length != 11)
        return false;
    if (obj_val.charAt(3) != "-" && obj_val.charAt(3) != " ")
        return false;
    if (obj_val.charAt(6) != "-" && obj_val.charAt(6) != " ")
        return false;
    for (var i = 0; i < obj_val.length; i++) {
        check_char = white_space.indexOf(obj_val.charAt(i))
        if (check_char < 0)
            ssc_string += obj_val.substring(i, (i + 1));
    }
    if (ssc_string.length != 9)
        return false;
    if (!_validate_checkinteger(ssc_string))
        return false;
    return true;
}
function _validate_checkphone(obj_val) {
    if (obj_val.length == 0)
        return true;
    if (obj_val.length != 12)
        return false;
    if (!_validate_checknumber(obj_val.substring(0,3)))
        return false;
    else if (!_validate_numberrange((eval(obj_val.substring(0,3))),100,1000))
        return false;
    if (obj_val.charAt(3) != "-" && obj_val.charAt(3) != " ")
        return false;
    if (!_validate_checknumber(obj_val.substring(4,7)))
        return false;
    else if (!_validate_numberrange((eval(obj_val.substring(4,7))), 100, 1000))
        return false;
    if (obj_val.charAt(7) != "-" && obj_val.charAt(7) != " ")
        return false;
    if (obj_val.charAt(8) == "-" || obj_val.charAt(8) == "+")
        return false;
    else {
        return (_validate_checkinteger(obj_val.substring(8,12)));
    }
}
function _validate_checktime(obj_val) {
    if (obj_val.length == 0)
        return true;
    isplit = obj_val.indexOf(':');
    if (isplit == -1 || isplit == obj_val.length)
        return false;
    sHour = obj_val.substring(0, isplit);
    iminute = obj_val.indexOf(':', isplit + 1);
    if (iminute == -1 || iminute == obj_val.length)
        sMin = obj_val.substring((sHour.length + 1));
    else
        sMin = obj_val.substring((sHour.length + 1), iminute);
    if (!_validate_checkinteger(sHour)) //check hour
        return false;
    else if (!_validate_checkrange(sHour, 0, 23)) //check hour
        return false;
    if (!_validate_checkinteger(sMin)) //check minutes
        return false;
    else if (!_validate_checkrange(sMin, 0, 59)) // check minutes
        return false;
    if (iminute != -1) {
        sSec = obj_val.substring(iminute + 1);
        if (!_validate_checkinteger(sSec)) //check seconds
            return false;
        else if (!_validate_checkrange(sSec, 0, 59)) //check seconds
            return false;
    }
    return true;
}
function _validate_checkzip(obj_val) {
    if (obj_val.length == 0)
        return true;
    if (obj_val.length != 5 && obj_val.length != 10)
        return false;
    if (obj_val.charAt(0) == "-" || obj_val.charAt(0) == "+")
        return false;
    if (!_validate_checkinteger(obj_val.substring(0,5)))
        return false;
    if (obj_val.length == 5)
        return true;
    if (obj_val.charAt(5) != "-" && obj_val.charAt(5) != " ")
        return false;
    if (obj_val.charAt(6) == "-" || obj_val.charAt(6) == "+")
        return false;
    return (_validate_checkinteger(obj_val.substring(6,10)));
}

function _validate_checkemail(obj_val) {
    // invalid if blank
    if (obj_val == "") {
        return false;
    }
    // invalid if any character is invalid
    invalidChars = "/:,;"
    for (i=0; i < invalidChars.length; i++) {
        badChar = invalidChars.charAt(i);
        if (obj_val.indexOf(badChar,0) > -1) {
            return false;
        }
    }
    // invalid if email does not have the @ sign
    atPos = obj_val.indexOf("@",1);
    if (atPos == -1) {
        return false;
    }
    // invalid if no period after @ sign (domain)
    periodPos = obj_val.indexOf(".",atPos);
    if (periodPos == -1) {
        return false;
    }
    // invalid if no domain name between period and at sign
    if ((periodPos - atPos) < 2) {
        return false;
    }
    // invalid if there are less than 2 characters after period
    if (periodPos+3 > obj_val.length) {
        return false;
    }
    return true;
}
function _validate_password(obj_val) {
    if (obj_val.length < 6)
        return false;
    var check_char;
    var has_numeric = false;
    var has_alpha = false;
    for (var i = 1; i < obj_val.length; i++) {
        check_char = obj_val.charAt(i);
        if (!((check_char >= "0" && check_char <="9") ||
	    (check_char >= "A" && check_char <="Z") ||
	    (check_char >= "a" && check_char <="z"))) {
            return false;
	} else {
		if (check_char >= "0" && check_char <="9") {
			has_numeric = true;
		} else {
			has_alpha = true;
		}
	}
    }
    return (has_numeric & has_alpha);
}