iframe {
  	position:absolute;
  	top: 0; /* 25 pixels from the top of the <div> tag. */
  	left:0; /* 350 pixels from the left of the <div> tag. */
  	height: 768px; /* in this case, we get rid of the overflow setting, because the height of the iframe is increased by itself.*/
  	width: 100%;
	border:0;
	
}