#modalOverlay {
  background-color:#000;
  cursor:wait;
}

#modalContainer {
  height:300px;
  width:600px;
  left:50%;
  top:15%;
  margin-left:-300px; /* half the width, to center */
  background-color:#fff;
  border: 0px solid #ccc;
}

#modalContainer a.modalCloseImg {
  background:url(x.png) no-repeat;
  width:25px;
  height:29px;
  display:inline;
  z-index:3200;
  position:absolute;
  top:-14px;
  right:-18px;
  cursor:pointer;
}

<!--[if lt IE 6]>

  #modalContainer a.modalCloseImg{
    background:none;
	right:-14px;
	width:22px;
	height:26px;
    filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(
        src='x.png', sizingMethod='scale'
      );
  }
  #modalContainer {
    top: expression((document.documentElement.scrollTop
        || document.body.scrollTop) + Math.round(15 *
        (document.documentElement.offsetHeight
        || document.body.clientHeight) / 100) + 'px');
  }

<![endif]-->