// JavaScript Generic Validation Document
var numb = '0123456789';
var lwr = 'abcdefghijklmnopqrstuvwxyz';
var upr = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
var digits = "0123456789";
var phoneNumberDelimiters = "()- ";
var validWorldPhoneChars = phoneNumberDelimiters + "+";
var minDigitsInIPhoneNumber = 10;
function isValid(parm,val)
{
	if (parm == "") return true;
	for (i=0; i<parm.length; i++)
	{
		if (val.indexOf(parm.charAt(i),0) == -1) return false;
	}
	return true;
}

function isAlpha(who)
{
	var affected = document.getElementById(who);
	var param = trim(affected.value);
	var affected_error = document.getElementById(who+'_error');

	if(isValid(param,lwr + upr + " ") != true || param.length <= 0)
	{
			affected.value = "";
			if(param.length <= 0)
			{
				affected_error.innerHTML = "This is a required field.";
			}
			else
			{
				affected_error.innerHTML = "Please only use alpha characters.";
			}
			affected.style.border = "2px solid red";
			return false;
	}
	else
	{
			affected_error.innerHTML = "";
			affected.style.border = "2px solid green";
			return true;
	}
}

function isEmail(who)
{
	var affected = document.getElementById(who);
	var param = affected.value;
	var affected_error = document.getElementById(who+'_error');

	if(validateEmail(param) != true || param.length <= 0)
	{
			affected.value = "";
			if(param.length <= 0)
			{
				affected_error.innerHTML = "This is a required field.";
			}
			else
			{
				affected_error.innerHTML = "Please use a valid email address.";
			}
			affected.style.border = "2px solid red";
			return false;
	}
	else
	{
			affected_error.innerHTML = "";
			affected.style.border = "2px solid green";
			return true;
	}
}

function validateEmail(email)
{
   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   if(reg.test(email) == false)
   {
		return false;
   }
	return true;
}

function isNotEmpty(who)
{
	var affected = document.getElementById(who);
	var param = trim(affected.value);
	var affected_error = document.getElementById(who+'_error');

	if(param.length <= 0)
	{
		affected.value = "";
		affected_error.innerHTML = "This is a required field.";
		affected.style.border = "2px solid red";
		return false;
	}
	else
	{
			affected_error.innerHTML = "";
			affected.style.border = "2px solid green";
			return true;
	}
}

function isNotEmptyHTML(who)
{
	var affected = document.getElementById(who);
	var param = trim(affected.value);
	var affected_error = document.getElementById(who+'_error');

	if(param.length <= 0)
	{
		affected.value = "";
		affected_error.innerHTML = "This is a required field.";
		affected.style.border = "2px solid red";
		return false;
	}
	else
	{
			affected_error.innerHTML = "";
			affected.style.border = "2px solid green";
			return true;
	}
}

function isTel(who)
{
	var affected = document.getElementById(who);
	var param = affected.value;
	var affected_error = document.getElementById(who+'_error');
	if ((param==null)||(param==""))
	{
		affected_error.innerHTML = "This is a required field.";
		affected.style.border = "2px solid red";
		return false
	}
	if (checkInternationalPhone(param)==false){
		affected_error.innerHTML = "Please use a valid number.";
		affected.style.border = "2px solid red";
		return false
	}
	affected_error.innerHTML = "";
	affected.style.border = "2px solid green";
	return true
}
function isInteger(s)
{   var i;
    for (i = 0; i < s.length; i++)
    {   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}
function trim(s)
{   var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not a whitespace, append to returnString.
    for (i = 0; i < s.length; i++)
    {   
        // Check that current character isn't whitespace.
        var c = s.charAt(i);
        if (c != " ") returnString += c;
    }
    return returnString;
}
function stripCharsInBag(s, bag)
{   var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to 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 checkInternationalPhone(strPhone)
{
var bracket=3
strPhone=trim(strPhone)
if(strPhone.indexOf("+")>1) return false
if(strPhone.indexOf("-")!=-1)bracket=bracket+1
if(strPhone.indexOf("(")!=-1 && strPhone.indexOf("(")>bracket)return false
var brchr=strPhone.indexOf("(")
if(strPhone.indexOf("(")!=-1 && strPhone.charAt(brchr+2)!=")")return false
if(strPhone.indexOf("(")==-1 && strPhone.indexOf(")")!=-1)return false
s=stripCharsInBag(strPhone,validWorldPhoneChars);
return (isInteger(s) && s.length >= minDigitsInIPhoneNumber);
}

function trim(stringToTrim) {
	return stringToTrim.replace(/^\s+|\s+$/g,"");
}
function ltrim(stringToTrim) {
	return stringToTrim.replace(/^\s+/,"");
}
function rtrim(stringToTrim) {
	return stringToTrim.replace(/\s+$/,"");
}

function isSelect(who)
{
	var affected = document.getElementById(who);
	var param = affected.value;
	var affected_error = document.getElementById(who+'_error');

	if(param == "")
	{
				affected_error.innerHTML = "This is a required field.";

				affected.style.border = "2px solid red";
				return false;
	}
	else
	{
			affected_error.innerHTML = "";
			affected.style.border = "2px solid green";
			return true;
	}
}


function isPostCode(who)
{
	var affected = document.getElementById(who);
	var param = affected.value;
	var affected_error = document.getElementById(who+'_error');
	if ((param==null)||(param==""))
	{
		affected_error.innerHTML = "This is a required field.";
		affected.style.border = "2px solid red";
		return false
	}
	if (isValidPostcode(param)==false){
		affected_error.innerHTML = "Please use a valid post code.";
		affected.style.border = "2px solid red";
		return false
	}
	affected_error.innerHTML = "";
	affected.style.border = "2px solid green";
	return true
}

function isValidPostcode(p) 
{
	var postcodeRegEx = /[A-Z]{1,2}[0-9]{1,2} ?[0-9][A-Z]{2}/i;
	return postcodeRegEx.test(p);
}

function formatPostcode(p) 
{
	if (isValidPostcode(p)) 
	{
		var postcodeRegEx = /(^[A-Z]{1,2}[0-9]{1,2})([0-9][A-Z]{2}$)/i;
		return p.replace(postcodeRegEx,"$1 $2");
	} 
	else 
	{
		return p;
	}
}