var submittedOnce = false;
function preventDoubleSubmit() {
    if (!submittedOnce) {
        submittedOnce = true;
        return true;
    } else {
        return false;
    }
}

var processedOnce = false;
function preventDuplicateProcessing() {
    if (!processedOnce) {
        processedOnce = true;
        return true;
    } else {
        return false;
    }
}

function maskDLNumber(xdNumber){
	orignalLength = xdNumber.length;
    if(orignalLength <=4){
		xdNumber="";
		for(var i = 0; i <orignalLength ; i++) {
			xdNumber += '*';
		}
	}
	else {
		stringLength = orignalLength - 4;
		remainingString = xdNumber.substring(stringLength,orignalLength);
		xdNumber="";
		for(var i = 0; i < stringLength; i++) {
			xdNumber += '*';
		}
		xdNumber +=remainingString;
	}
	return xdNumber;
}


function maskCCNumber(xdNumber){	
		orignalLength = xdNumber.length;
        stringLength = orignalLength - 4;
		remainingString = xdNumber.substring(stringLength,orignalLength);
		xdNumber="";
		for(var i = 0; i < stringLength; i++) {
		    xdNumber += '*';
        }
		xdNumber +=remainingString;
		return xdNumber;
}