div.modal-overlay
{
  top: 0;
  left: 0;
  position: fixed;
  height: 100%;
  width: 100%;
  z-index: 1000000;
  background: #000;
  filter:alpha(opacity=70);
  -moz-opacity:0.7;
  -khtml-opacity: 0.7;
  opacity: 0.7;
}
div.modal-window
{
  top:35%;
  left:35%;
  position: absolute;
  width: 30%;
  z-index: 1000001;
  background: #fff;
  border: solid 5px #ddd;
  padding: 10px;
}
span#modal-close-btn
{
  top: 0;
  right:10px;
  position:absolute;
  font-size:11px;
  float:right;
}