/**
*   Oeffnet eine Lightbox.
*
*   @param string container ID des Lightbox DIVs
*   @param string cancel_link   ID des Cancel-Link DIVs
*/
function showLightbox(container, cancel_link) {
    var errorbox = new Lightbox.base(container, { externalControl : cancel_link, closeOnOverlayClick : true });
}