/*function requires presence of arrRE array containing messages and validation masks
*/

function addRequiredField (name,mask,defaultText,message) 
{
	//alert(name + " mask = " + mask);
	arrRE[name] = [mask,defaultText,message];
}

function deleteRequiredField(name) 
{
		delete arrRE[name];
}

function resetErrorMessages() 
{
	listObj = document.getElementById("errorMessages");
	listObj.innerHTML = "";
}

function addErrorMessage(message)
{
	listObj = document.getElementById("errorMessages");
	//listObj.innerHTML += "<li class=\"errorMessageItem\">" + message + "</li>";
	listObj.innerHTML += "&bull;&nbsp;" + message + "<br>";
}

function validateForm(form) 
{
	var len = arrRE.length;
	var element,elementName,mask,message,isValid,defaultText;
	var formValidated = true;
	var errorLayer = document.getElementById("errorLayer").style;
	var formLayer = document.getElementById("submitForm").style;
	resetErrorMessages();
	//var errorlayer = getStyleObj('errorLayer');
	for (var i in arrRE) {
		elementName = i;
		mask = arrRE[i][0];
		defaultText = arrRE[i][1];
		message = arrRE[i][2];
		element = document.getElementById(i);
		//alert(i + " = " + element);
		isValid = validateElement(element,mask,defaultText);
		
		if (isValid == false) 
		{
			formValidated = false;
			addErrorMessage(message);
		}
	}
	
	if (formValidated == false) 
	{
		showHideObject("errorLayer","show");
	} 
	else 
	{
		showHideObject("errorLayer","hide");
	}
	
	return formValidated;
}

function validateElement(element,mask,defaultText) 
{
	switch (mask)
	{
		case "default":	
			return isNotEmpty(trim(element.value));
		break;
		
		case "default-nonmatch":
			return isNotEmpty(trim(element.value)) && trim(element.value) != defaultText;
		break;
		
		case "numeric":
			return isNumeric(trim(element.value));
		break;
		
		case "numericorempty":
			return (isNumeric(trim(element.value)) || !isNotEmpty(trim(element.value)));
		break;
		
		case "numericmorethanzero":
			return (isNumeric(trim(element.value)) && parseFloat(trim(element.value)) > 0);
		break;
		
		case "creditcard":
			return isValidCC(element.value,16);
		break;
		
		case "currency":
			return isMoney(element.value);
		break;
		
		case "float":
			return isFloat(element.value);
		break;
		
		case "date":
			return isValidDate(element.value);
		break;
		
		case "email":
			return isValidEmail(element.value);
		break;
		
		case "phone":
			return isValidPhoneNumber(element.value);
		break;
		
		case "phonesansareacode":
			return isValidPhoneNumberSansAreaCode(element.value);
		break;
		
		case "phoneorempty":
			return isValidPhoneNumberOrEmpty(element.value);
		break;
		
		case "zip":
			return isValidZipCode(element);
		break;
		
		case "canadianpostalcode":
			return isValidCanadianPostalCode(element.value);
		break;
		
		case "selected":
			return isItemSelected(element);
		break;
		
		case "radio-selected":
			return isRadioSelected(element);
		break;
		
		case "checked":
			return isChecked(element);
		break;
	}
}

function isChecked(obj)
{
	return (obj.checked == true);
}

function isItemSelected (obj) 
{
	return obj.selectedIndex > 0;
}

function isRadioSelected (obj) {
	var group = form[obj.name];
	var len = group.length;
	for (var i=0;i<len;i++) 
	{
		if (group[i].checked == true) 
		{
			return true;
		}
	}
	return false;
}

function isNotEmpty(str) {
	str.split(" ").join("");
	str.split("\n").join("");
	str.split("\t").join("");
	return (str.length > 0);
}

function isNumeric(val) {
	if (isNotEmpty(val) == false) {
		return false;
	}

	if (isNaN(val)) {
		return false;
	}
	
	return true;

}

function isValidPhoneNumberSansAreaCode(val)
{
	re = /\d\d\d-?\d\d\d\d/;
	return re.test(val);
}


function isValidPhoneNumberOrEmpty(val)
{
	return (isValidPhoneNumberSansAreaCode(val) || !isNotEmpty(val));
}

function isValidCC(ccNo,minLen) {
	var str = ccNo.toString();
	str = str.split("-").join("");
	str = str.split(" ").join("");	
	
	if(isNumeric(str) == false){
		return false;
	}
	
	var minLen = parseInt(minLen,10);

	if(str.length<minLen) return false;
	
	var numbers = str.split("");
	var len = numbers.length;
	for(var i = 0; i < len; i++, i++){
		var num = numbers[i]*2;
		num = num.toString();
		if(num.length == 2){
			num = Number(num.substr(0,1)) + Number(num.substr(1));
		}	
		numbers[i] = num;
	}
	
	var mNum = 0;
	for(var i = 0; i < len; i++){
		mNum+=Number(numbers[i]);
	}
	
	return (mNum%10==0);
}

function isMoney(val) {
}

function isFloat(val) {
}

//function isValidDate(val) {
//}

function isValidZipCode(element) {
	var val = element.value;
	var isValid = false;
	var len = val.length;
	if (isNotEmpty(val) == false) return false;	
	if (val.length != 5 && val.length != 10) {
		return false;
	}
	//standard zip
	if (val.length == 5) {
		var re = /(\b\d{5}\b)/;	
		isValid = re.test(val);
		return isValid;
	}
	//zip plus 4
	if (val.length == 10) {
		var re2 = /(\b\d{5}-\d\{4}\b)/;
		isValid = re2.test(val);
		return isValid;
	}
}

function isValidCanadianPostalCode(val)
{
	var re = /[ABCEGHJKLMNPRSTVXY]\d[ABCEGHJKLMNPRSTVWXYZ] \d[ABCEGHJKLMNPRSTVWXYZ]\d/;
	return re.test(val);
}

function isValidEmail(emailStr) {
// Changes:  Sandeep V. Tamhankar (stamhankar@hotmail.com) 
/* 1.1.2: Fixed a bug where trailing . in e-mail address was passing
(the bug is actually in the weak regexp engine of the browser; I
simplified the regexps to make it work).
1.1.1: Removed restriction that countries must be preceded by a domain,
so abc@host.uk is now legal.  However, there's still the 
restriction that an address must end in a two or three letter
word.
1.1: Rewrote most of the function to conform more closely to RFC 822.
1.0: Original  */
/* The following pattern is used to check if the entered e-mail address
fits the user@domain format.  It also is used to separate the username
from the domain. */
var emailPat=/^(.+)@(.+)$/
/* The following string represents the pattern for matching all special
characters.  We don't want to allow special characters in the address. 
These characters include ( ) < > @ , ; : \ " . [ ]    */
var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
/* The following string represents the range of characters allowed in a 
username or domainname.  It really states which chars aren't allowed. */
var validChars="\[^\\s" + specialChars + "\]"
/* The following pattern applies if the "user" is a quoted string (in
which case, there are no rules about which characters are allowed
and which aren't; anything goes).  E.g. "jiminy cricket"@disney.com
is a legal e-mail address. */
var quotedUser="(\"[^\"]*\")"
/* The following pattern applies for domains that are IP addresses,
rather than symbolic names.  E.g. joe@[123.124.233.4] is a legal
e-mail address. NOTE: The square brackets are required. */
var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
/* The following string represents an atom (basically a series of
non-special characters.) */
var atom=validChars + '+'
/* The following string represents one word in the typical username.
For example, in john.doe@somewhere.com, john and doe are words.
Basically, a word is either an atom or quoted string. */
var word="(" + atom + "|" + quotedUser + ")"
// The following pattern describes the structure of the user
var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
/* The following pattern describes the structure of a normal symbolic
domain, as opposed to ipDomainPat, shown above. */
var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")
/* Finally, let's start trying to figure out if the supplied address is
valid. */
/* Begin with the coarse pattern to simply break up user@domain into
different pieces that are easy to analyze. */
var matchArray=emailStr.match(emailPat)
if (matchArray==null) {
/* Too many/few @'s or something; basically, this address doesn't
even fit the general mould of a valid e-mail address. */
return false
}
var user=matchArray[1]
var domain=matchArray[2]
// See if "user" is valid 
if (user.match(userPat)==null) {
// user is not valid
return false
}
/* if the e-mail address is at an IP address (as opposed to a symbolic
host name) make sure the IP address is valid. */
var IPArray=domain.match(ipDomainPat)
if (IPArray!=null) {
// this is an IP address
for (var i=1;i<=4;i++) {
if (IPArray[i]>255) {
return false;
}
}
return true;
}
// Domain is symbolic name
var domainArray=domain.match(domainPat)
if (domainArray==null) {
return false;
}
/* domain name seems valid, but now make sure that it ends in a
three-letter word (like com, edu, gov) or a two-letter word,
representing country (uk, nl), and that there's a hostname preceding 
the domain or country. */
/* Now we need to break up the domain to get a count of how many atoms
it consists of. */
var atomPat=new RegExp(atom,"g")
var domArr=domain.match(atomPat)
var len=domArr.length
if (domArr[domArr.length-1].length<2 || 
domArr[domArr.length-1].length>3) {
// the address must end in a two letter or three letter word.
return false;
}
// Make sure there's a host name preceding the domain.
if (len<2) {
return false;
}
// If we've gotten this far, everything's valid!
return true;
}

function isValidPhoneNumber(val) {
	if (isNotEmpty(val) == false) return false;
	//phone number match
	re = /[(]?\d{3}[)-]?\s*\d{3}[-]?\s*\d{4}\s*/;
	var isValid = re.test(val);
	return isValid;	
}

function isValidDate(str)
{
	arr = str.split("/");
	
	if (arr.length < 3) 
	{
		return false;
	}
	
	if (parseInt(arr[2]) < 2000)
	{
		return false;
	}
		
	var day = arr[1]
	var month = arr[0];
	var year = arr[2];

	var dteDate;
	
	//set up a Date object based on the day, month and year arguments
	//javascript months start at 0 (0-11 instead of 1-12)
	dteDate=new Date(year,month,day);
	
	/*
	Javascript Dates are a little too forgiving and will change the date to a reasonable guess if it's invalid. We'll use this to our advantage by creating the date object and then comparing it to the details we put it. If the Date object is different, then it must have been an invalid date to start with...
	*/
	
	return ((day==dteDate.getDate()) && (month==dteDate.getMonth()) && (year==dteDate.getFullYear()));
	
}

function showHideObject (id,show)
{
	
	var styleObj = document.getElementById(id).style;
	
	if (show == "show") 
	{
		styleObj.display = "inline";
	}
	else
	{
		styleObj.display = "none";
	}

}

function trim(strText) { 
    // this will get rid of leading spaces 
    while (strText.substring(0,1) == ' ') 
        strText = strText.substring(1, strText.length);

    // this will get rid of trailing spaces 
    while (strText.substring(strText.length-1,strText.length) == ' ')
        strText = strText.substring(0, strText.length-1);

   return strText;
}