.ht_masker {
	width: 100%;
	height: 100%;
	background-color: #000;
	opacity: 0;
	filter: alpha(opacity = 0);
	position: fixed;
	left: 0;
	top: 0;
	z-index: 500;
	-webkit-transition: all 0.5s;
	-moz-transition: all 0.5s;
	transition: all 0.5s;
}

.ht_masker.open {
	opacity: 0.1;
	filter: alpha(opacity = 10);
	display: block;
}

.ht_masker.close {
	opacity: 0;
	filter: alpha(opacity = 0);
}