// VALIDATION FUNCTIONS
    

function CheckEmail(emailAddress) {

    var filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
    if (!filter.test(emailAddress)) 
        return false;
    else
        return true;
}

function CheckPostalCode(postalCode)
{
    if (postalCode.match(/^[a-zA-Z][0-9][a-zA-Z](-|\s){0,1}[0-9][a-zA-Z][0-9]$/))
        return true;
    else
        return false;

}

//Add Zip Code Valication(For USA)
function CheckZipCode(zipCode)
{
    if (zipCode.match(/^[0-9]{5}$/)) 
        return true;
    else
        return false;
}

function CheckTelephone(telephone)
{
    if (telephone.match(/^[0-9\-\s\.\)\(]{10,}$/))
        return true;
    else
        return false;
}    

function CheckCardNumber(cardNumber)
{
    if (cardNumber.match(/^[0-9\-\s]{13,25}$/))
        return true;
    else
        return false;
}

function CheckSecurityCode(cardSecurityCode)
{
    if (cardSecurityCode.match(/^[0-9]{3,6}$/))
        return true;
    else
        return false;    
}

function CheckCardExpiry(month, year)
{
    var currentDate = new Date();

    if(year == currentDate.getFullYear())
    {
        if(month <= (currentDate.getMonth() + 1))
            return false;
    }
    return true;
}

function CheckTextOnly(textVal)
{

    var filter = /^[a-zA-Z\s]{0,}$/;

    if (!filter.test(textVal)) 
        return false;
    else
        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 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++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}

function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   } 
   return this
}

function isDate(dtStr, mYear){

    var dtCh= "/";
    var minYear=1900;
    var maxYear=2100;
    if(mYear != "")
        maxYear = mYear;
        
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strMonth=dtStr.substring(0,pos1)
	var strDay=dtStr.substring(pos1+1,pos2)
	var strYear=dtStr.substring(pos2+1)
	strYr=strYear
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
	}
	month=parseInt(strMonth)
	day=parseInt(strDay)
	year=parseInt(strYr)
	if (pos1==-1 || pos2==-1){
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		return false
	}
	
    return true
}