#mask {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 9000;
  background-color: #1678d4;
  display: none;
}

#boxes .window {
  background: url(https://www.sternemedia.com/policia/images/background.png) no-repeat center center fixed;
-webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size:  auto;
  position: absolute;
  left: 10;
  top: 10;
  width: 440px;
  height: 450px;
  display: none;
  z-index: 9999;
  padding: 10px;
  border-radius: 15px;
  text-align: left;
}

#boxes #dialog {
  width: 750px;
  height: 450px;
  padding: 10px;
  background-color: #ffffff;
  font-family: 'Segoe UI Light', sans-serif;
  font-size: 15pt;
}

#popupfoot {
  font-size: 12pt;
  position: absolute;
  bottom: 0px;
  width: 250px;
  left: 250px;
}