.ajax-progress-throbber {
    display:none;
}
.element-hidden {
    display: none;
}
.element-invisible {
    position: absolute !important;
    clip: rect(1px 1px 1px 1px); /* IE6, IE7 */
    clip: rect(1px, 1px, 1px, 1px);
    overflow: hidden;
    height: 1px;
}
.url-textfield { display: none !important; }