#cover{
  z-index: 90;
  background-color: #000;
  position: absolute;
  width: 100%;
  height: 100%;
  _height:expression(document.body.clientHeight);
  filter:alpha(opacity=50);
  -moz-opacity:.50;
  opacity:.50;
  -khtml-opacity = .50;
  display: none;
  height:3200px;
  top:0;
  left: 0;
}

body {
  _height:expression(document.body.clientHeight);
}

#modalwindow .modalclose {
  cursor: pointer;
  position: absolute;
  right: -4px;
  top: -10px;
  
}

#modalwindow {
  width: 840px;
  height: 520px;
  border: 3px solid #000;
  background: url('../images/slideshow.loading.gif') no-repeat center center;
  background-color: #fff;
  position: absolute;
  top: 850px;
  left: 50%;
  margin: -260px 0 0 -405px;
  z-index: 1000;
  padding:10px;
}