#l_blind, #l_container {
  position: absolute;
  top: 0;
  left: 0;
}
#l_blind {
  background-color: #000;
  z-index: 1;
  width: 100%;
  height: 100%;
  opacity: 0.7;
  filter: alpha(opacity=70);
}
#l_container {
  z-index: 2;
}