// element identifiers 
var captchaImageId = 'SampleForm_CaptchaImage';
var codeTextboxId = 'CaptchaCode';
var errorLabelId = 'CodeIncorrectLabel';
var successLabelId = 'CodeCorrectLabel';
var formId = '';

// other settings
var validationPrompt = 'validating...';
var ajaxTimeoutMiliseconds = 5000;

// shared variable declarations
var LBD_ValidationResult = false;
var LBD_ValidationRequest = null;
var LBD_CodeInput = null;
var LBD_ValidationPrompt = null;
var LBD_ErrorPrompt = null;
var LBD_SuccessPrompt = null;
var LBD_PromptParent = null;