.fb_overlay {
	z-index:99999;
	width: 100%;
	height: 100%;
	background: #000;
	opacity:0.5;
	position: fixed;
	top: 0%;
	left: 0%;
}

#fb_box {
	z-index:999999;
	position:fixed;
	top: 50%;
	left: 50%;
	margin-top: -145px; /*Half of your settings height*/
	margin-left: -200px; /*Half of your settings width*/
}

#fb_box iframe {
	display: block;
	margin: 0;
	padding: 0;
}

#fb_box.dark { 
	background:#000;
	border:1px solid #aaaaaa;
	-moz-box-shadow: 0 0 5px #fff;
	-webkit-box-shadow: 0 0 5px #fff;
	box-shadow: 0 0 5px #fff;
}

#fb_box.light { 
	background:#fff;
	border:1px solid #aaaaaa;
	-moz-box-shadow: 0 0 5px #000;
	-webkit-box-shadow: 0 0 5px #000;
	box-shadow: 0 0 5px #000;
}

#fb_box_close { 
	right:0px;
	top:0px;
	position:absolute;
	cursor: pointer;
}