/* Z-index of #mask must lower than #boxes .window */  
#mask {
  position:absolute;
  left:0;
  top:0;
  z-index:9000;
  background-color:#000;
  display:none;
}
  
#boxes .window {
  position:absolute;
  left:0;
  top:0;
  width:440px;
  height:200px;
  display:none;
  z-index:9999;
  padding:20px;
}

#boxes #browser_alert {
  width:375px; 
  height:180px;
  padding:10px;
  background-color:#ffffff;
  text-align: left;
  line-height: 1.3em;
}

#boxes #browser_alert h1 {
    font-size: 17px;
    font-weight: bold;
    padding: 0 0 12px;
}

#boxes #browser_alert ul {
    padding: 6px 0;
}

#boxes #browser_alert ul li {
    list-style: disc;
    background: none;
    margin: 0 20px;
    padding: 0;
}

#boxes #browser_alert #browser_dismiss {
     text-align: center;
}