.modal-overlay { background-image : url(../imgs/bg-modal-overlay.png); display : none; height : 100%; left : 0; position : fixed; top :0; width : 100%; z-index:3000; }
* html.modal {

     position: absolute;
     top: expression((document.documentElement.scrollTop || document.body.scrollTop) + Math.round(17 * (document.documentElement.offsetHeight || document.body.clientHeight) / 100) + 'px');
}
.modal { background-color:#FFFFFF; left:50%; margin-left:-242px; padding:20px; position:fixed; top:17%; width:484px; }

/* bt-close */
.close-modal { background : url(../imgs/fenster-schliessen.png) no-repeat; float : right; height : 18px; width : 116px; }
.close-modal_en { background : url(../imgs/en/schliessen.png) no-repeat; width : 55px; }
.close-modal span { display : none; }