ul.three_r{
	margin:0 auto;
	width:740px;
	list-style:none;
}
.three_r li{
	margin-bottom:20px;
	position:relative;
}
.three_r li p{
	position:absolute;
	height:200px;
	overflow:auto;
	z-index:0;
}
.three_r li img{
	position:relative;
	background:#FFFFFF;
	z-index:1;
}