/* Z-index of #mask must lower than #boxes .window */
#mask {
  position:absolute;
  z-index:9000;
  background-color:#000;
  display:none;
}
  
#boxes .window {
  position:absolute;
  width:650px;
  height:300px;
  display:none;
  z-index:9999;
  padding:20px;
}

.window a:link      { color: white }
.window a:visited { color: white }
.window a:active  { color: white }
.window a:hover  { color: red }
.window a:focus  { color: red }
.window h2 {color: orange }