.enc_box {
	z-index: 2;position: absolute;top: 0px;
	background-color:#fffccc;
	position:absolute;
	width:250px;
	height:250px;
	top:0px;
	right:0px;
/*	filter:Alpha(opacity=60); -moz-opacity:0.6; opacity:0.6; */
}

.z-a {z-index: 2;position: absolute;left: 0px;top: 0px;}
.z-b {z-index: 1;position: absolute;left: 0px;top: 0px;}