var s_id = 'MainCommentDiv';

function show_add_comment_form(id) {
    var f = document.getElementById(s_id);
    document.getElementById('AnswerCommentIdText').value = id;
    if (s_id == id && f.style.display == 'block') { return hide_add_comment_form(); }
    f.style.display = 'none';

    var d = document.getElementById(id);
    d.appendChild(f.firstChild);
    d.style.display = 'block';

    document.getElementById('AnswerComment').value = "";
    document.getElementById('AnswerComment').focus();
    s_id = id;

    return false;
}

function hide_add_comment_form() {
    var f = document.getElementById(s_id);
    f.style.display = 'none';
    document.getElementById('AnswerCommentIdText').value = "";
    return false;
}