function askForCaptcha(emailAddress, resultText) {
    var isValidEmailAddress = IsValidEmail(document.getElementById(emailAddress).value);
    if (isValidEmailAddress) {
        document.getElementById(resultText).innerHTML = ' ';

        Sys.UI.DomElement.removeCssClass($get('newsLetterOuterDiv'), "newsLetter");
        Sys.UI.DomElement.addCssClass($get('newsLetterOuterDiv'), "newsLetterOff");
         
        document.getElementById("captchaBox").style.display = 'block';
    }
    else {
        Sys.UI.DomElement.removeCssClass($get('newsLetterOuterDiv'), "newsLetterOff");
        Sys.UI.DomElement.addCssClass($get('newsLetterOuterDiv'), "newsLetter");
        if (document.getElementById(emailAddress).value == "" || document.getElementById(emailAddress).value == "enter your email") {
            document.getElementById(resultText).innerHTML = '   Enter your email address';
        }
        else {
            document.getElementById(resultText).innerHTML = 'Invalid email address';
        }
    }
}
function CloseCaptcha(resultText) {
    document.getElementById(resultText).innerHTML = ' ';
    document.getElementById("captchaBox").style.display = 'none';

    Sys.UI.DomElement.removeCssClass($get('newsLetterOuterDiv'), "newsLetterOff");
    Sys.UI.DomElement.addCssClass($get('newsLetterOuterDiv'), "newsLetter");
}
function changeChallengeImage(imgType) {
    if (imgType == "audio") {
        document.getElementById("audioImage").style.display = "none";
        document.getElementById("imgImage").style.display = "inline-block";
        Recaptcha.switch_type('audio');
    }
    else {
        document.getElementById("imgImage").style.display = "none";
        document.getElementById("audioImage").style.display = "inline-block";
        Recaptcha.switch_type('image');
    }
}
function EraseTextBox(emailField, status,resultText) {
    CloseCaptcha(resultText);
    if (status == "Erase" && document.getElementById(emailField).value == "enter your email")
    {
        document.getElementById(emailField).value = "";
    }
    else if(status == "Blank")
    {
        document.getElementById(emailField).value = "enter your email";
    }

}