.parallax-viewport {
    position: absolute;
	width:1200px;
    height:600px;
	top:50%;
	left:50%;
	margin-left:-600px;
}
.parallax-layer {
    position: absolute;
}
.cloud{
	width:215px;
	height:55px;
	background-image:url(../images/index/cloud.png);
	background-repeat:no-repeat;
	position:absolute;
	top:50%;
	left:50%;
	margin-left:360px;
	margin-top:-150px;
}