body {
	width:960px;
	margin:0 auto;
	text-align:left;
	position:relative;
}

.ad_left{
display: block; position:absolute;  top:20px;  width:120px; left:-130px; 
}

.ad_right{
display: block; position:absolute;  top:20px;width:120px;  right:-130px;
}

.ad_close{
float:right;
padding:2px;
z-index:2000;
font-size:12px;
height:20px;
cursor:pointer;
}