/* Z-index of #mask must lower than #boxes .window */
#mask {
  position:absolute;
  z-index:9000;
  background-color:#0F3990;
  display:none;
  top: 0;
  left: 0;
}
  
#boxes .window {
  position:absolute;
/*
  width:440px;
  height:200px;
*/
  display:none;
  z-index:9999;
  padding:20px;
  background: White;
}


/* Customize your modal window here, you can add background image too */
#boxes #rueckrufdialog {
/*
  width:375px; 
  height:203px;
*/
}