.parallax_container {
	clip: rect(0, auto, auto, 0);
	height: 100%;
	left: 0;
	position: absolute;
	top: 0;
	width: 100%;
	z-index: -10;
}
.parallax_container .parallax {
	/* optional */
	background-position: center;
	background-repeat: no-repeat;
	background-size: cover;
	height: 100%;
	left: 0;
	position: fixed;
	top: 0;
	width: 100%;
	z-index:10;
}

/* webkit clip fix */
@media screen and (-webkit-min-device-pixel-ratio: 0) {
	.parallax_container {
		clip: auto;
		-webkit-mask-image: -webkit-linear-gradient(top, #fff 0%, #fff 100%);
	}
}