#mistake {
  background-image: url(overlay.png);
  position: absolute;
  margin: auto;
  top:  0;
  left: 0;
  z-index: 100;
  width:  100%;
}

* html #mistake {
  background-image: none;
} 

#m_window {
  position: fixed;
  background: #fff;
  -webkit-box-shadow: 0px 0px 0px 10px rgba(170, 170, 170, 0.5);
  -moz-box-shadow: 0px 0px 0px 10px rgba(170, 170, 170, 0.5);
  box-shadow: 0px 0px 0px 10px rgba(170, 170, 170, 0.5); 
  border-radius: 5px;
  -webkit-border-radius: 5px;
  -moz-border-radius: 5px;
  width: 317px;
  height: 273px;
  z-index: 150;
}


#m_frame {
  border: 0; 
  width: 100%;
  height: 270px;
  border-radius: 5px;
  -webkit-border-radius: 5px;
  -moz-border-radius: 5px;
}

* html #m_frame {
  margin-top: 7px;
}