var mtCaptchaVisible = false;
function mtShowCaptcha() {
    var u = mtGetUser();
    if ( u && u.is_authenticated ) return;
    if (mtCaptchaVisible) return;
    var div = document.getElementById('comments-open-captcha');
    if (div) {
        div.innerHTML = '';
        mtCaptchaVisible = true;
    }
}

function mtEscapeJS(s) {
    s = s.replace(/'/g, "'");
    return s;
}

function mtUnescapeJS(s) {
    s = s.replace(/'/g, "'");
    return s;
}

function mtRememberMeOnClick(b) {
    if (!b.checked)
        mtClearUser(b.form);
    return true;
}

function mtCommentSessionVerify(app_user) {
    var u = mtGetUser();
    var f = document['comments_form'];
    if ( u && app_user && app_user.sid && ( u.sid == app_user.sid ) ) {
        f.submit();
    } else {
        alert('Your session has expired. Please sign in again to comment.');
        mtClearUser();
        mtFireEvent('usersignin');

        $('#comments-form').show();
        $('#comments-open-footer').hide();

    }
}

function mtReplyCommentOnClick(parent_id, author) {
    $('#comment-form-reply').show();

    var checkbox = document.getElementById('comment-reply');
    var label = document.getElementById('comment-reply-label');
    var text = document.getElementById('comment-text');

    // Populate label with new values
    var reply_text = 'Replying to <a href="#comment-'+ parent_id +'" onclick="location.href=this.href; return false">comment from '+ author +'</a>';
    label.innerHTML = reply_text;

    checkbox.value = parent_id; 
    checkbox.checked = true;
    text.focus();

    mtSetCommentParentID();
}

function mtSetCommentParentID() {
    var checkbox = document.getElementById('comment-reply');
    var parent_id_field = document.getElementById('comment-parent-id');
    if (!checkbox || !parent_id_field) return;

    var pid = 0;
    if (checkbox.checked == true)
        pid = checkbox.value;
    parent_id_field.value = pid;
}