var defaultEmptyOK = false;
var whitespace = " \t\n\r";
var digits = "0123456789";
var lowercaseLetters = "abcdefghijklmnopqrstuvwxyz";
var uppercaseLetters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
var ZIPCodeDelimiters = "-";
var ZIPCodeDelimeter = "-";
var validZIPCodeChars = digits + ZIPCodeDelimiters;
var digitsInZIPCode1 = 5;
var digitsInZIPCode2 = 9;
var whitespace = " \t\n\r";
var digitsInUSPhoneNumber = 10;
var phoneNumberDelimiters = "()- ";
var validUSPhoneChars = digits + phoneNumberDelimiters;

function isDigit (c)
{
    return ((c >= "0") && (c <= "9"))
}

function isEmpty(s)
{
	return ((s == null) || (s.length == 0))
}

function isWhitespace(s)
{   var i;
    if (isEmpty(s)) return true;
    for (i = 0; i < s.length; i++)
    {   
        var c = s.charAt(i);
        if (whitespace.indexOf(c) == -1) return false;
    }
	return true;
}

function reformat(s)
{
    var arg;
    var sPos = 0;
    var resultString = "";

    for (var i = 1; i < reformat.arguments.length; i++) {
       arg = reformat.arguments[i];
       if (i % 2 == 1) resultString += arg;
       else {
           resultString += s.substring(sPos, sPos + arg);
           sPos += arg;
       }
    }
    return resultString;
}

function reformatUSPhone (USPhone)
{
   return (reformat (USPhone, "(", 3, ") ", 3, "-", 4))
}
	
function isEmail(s)
{   if (isEmpty(s)) 
       if (isEmail.arguments.length == 1) return defaultEmptyOK;
       else return (isEmail.arguments[1] == true);
   
    if (isWhitespace(s)) return false;
    var i = 1;
    var sLength = s.length;

	while ((i < sLength) && (s.charAt(i) != "@"))
    { i++
    }

    if ((i >= sLength) || (s.charAt(i) != "@")) return false;
    else i += 2;

	while ((i < sLength) && (s.charAt(i) != "."))
    { i++
    }

	if ((i >= sLength - 1) || (s.charAt(i) != ".")) return false;
    else return true;
}

function isZIPCode(s)
{  if (isEmpty(s))
       if (isZIPCode.arguments.length == 1) return defaultEmptyOK;
       else return (isZIPCode.arguments[1] == true);
   return (isInteger(s) &&
            ((s.length == digitsInZIPCode1) ||
             (s.length == digitsInZIPCode2)))
}

function isInteger(s)
{   var i;
    if (isEmpty(s))
       if (isInteger.arguments.length == 1) return defaultEmptyOK;
       else return (isInteger.arguments[1] == true);
    for (i = 0; i < s.length; i++)
    {
        var c = s.charAt(i);
        if (!isDigit(c)) return false;
    }
    return true;
}

function stripWhitespace (s)
{
   return stripCharsInBag (s, whitespace)
}

function stripCharsNotInBag (s, bag)
{
    var i;
    var returnString = "";
    for (i = 0; i < s.length; i++)
    {
        // Check that current character isn't whitespace.
        var c = s.charAt(i);
        if (bag.indexOf(c) != -1) returnString += c;
    }
    return returnString;
}

function stripCharsInBag (s, bag)
{
    var i;
    var returnString = "";
    for (i = 0; i < s.length; i++)
    {
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function isUSPhoneNumber(s)
{
    if (isEmpty(s))
       if (isUSPhoneNumber.arguments.length == 1) return defaultEmptyOK;
       else return (isUSPhoneNumber.arguments[1] == true);
    return (isInteger(s) && s.length == digitsInUSPhoneNumber)
}