#content_wrapper {
  z-index: 1;
  overflow: hidden;
}

div#content_blog {
  position:absolute;
  top: 100%;
  left: 0;
  width: 100%;
  height: 0%;
  z-index: 999;
}

div#content_blog iframe {
  width: 100%;
  height: 100%;
  border: 0;
}