.background-blur {
	position: fixed;
	left: 0;
	right: 0;
	top: 0;
	bottom: 0;
	z-index: -1;
	display: block;
	background-attachment: fixed;
	background-size: cover; 
	-o-background-size: cover; 
	-moz-background-size: cover; 
	-webkit-background-size: cover;
	width: 100%;
	height: 100%;
	margin: auto;
    margin-top: auto;
    margin-right: auto;
    margin-bottom: auto;
    margin-left: auto;
}

.blur-low {
	-webkit-filter: blur(3px);
	-moz-filter: blur(3px);
	-o-filter: blur(3px);
	-ms-filter: blur(3px);
	filter: blur(3px);
}

.blur-normal {
	-webkit-filter: blur(10px);
	-moz-filter: blur(10px);
	-o-filter: blur(10px);
	-ms-filter: blur(10px);
	filter: blur(10px);
}

.blur-high {
	-webkit-filter: blur(50px);
	-moz-filter: blur(50px);
	-o-filter: blur(50px);
	-ms-filter: blur(50px);
	filter: blur(50px);
}