@font-face {
	font-family:'wryh';
	src: url('../img/微软雅黑.tff') format('truetype');
	/*src: url('../img/微软雅黑Light_1.0.ttc')format('truetype');*/
}
#overlay {
	background: #000;
	filter: alpha(opacity=50);
	/* IE的透明度 */
	opacity: 0.5;
	/* 透明度 */
	display: none;
	position: absolute;
	top: 0px;
	left: 0px;
	width: 100%;
	height: 100%;
	z-index: 1000;
	/* 此处的图层要大于页面 */
	display: none;
}