#mask {
position:absolute;
left:0px;
top:0px;
  z-index:100;
valign:middle;
align:center;
  display:none;

}
  
#boxes .window {
position:absolute;
left:0px;
top:0px;
valign:middle;
align:center;
  display:none;
  z-index:199;


}

#boxes #dialog {
position:absolute;
left:0px;
top:0px;
valign:middle;
align:center;

}