#pageLock {
  position: absolute;
  top: 0;
  left: 0;
  z-index:100;
  width: 100%;
  height: 100%;
  background:#000;
  filter:alpha(opacity=60);
  -moz-opacity: 0.7;
  opacity: 0.7;
}
img.page_loading {
  display:block;
  margin:25% 45%;
}