#content [class*="bg_"] {
  	position: relative;
  	height: 100%;
  	min-height: 400px;
  	background-attachment: fixed;
  	background-position: top center;
  	background-size: cover;
  	box-shadow: inset 0 0 1em #111;
  	box-shadow: inset 0 0 1em #111;
}
#content [class*="bg_"]:after {
	content: "";
	height: 100%;
	width: 100%;
	background: rgba(0,0,0,0.3);
	position: absolute;
    left: 0;
    top: 0;
}