@media screen {
  #popupdiv {
    position:absolute;
    left:0px;
    top:0px;
    width:100%;
    height:100%;
    z-index:100;
    visibility:hidden;
  }
  #preloaderdiv {
    position:absolute;
    left:0px;
    top:0px;
    width:100%;
    height:100%;
    z-index:99;
  }
}