div#slider_wrap{
	width: 900px;
	height: 500px;
	margin-top: -8px;
	margin-left: -8px;
	position: relative;
}
div#slider{
	position: relative;
	width: 900px;
	height: 500px;
}

#slider ul, #slider li{
	margin:0;
	padding:0;
	list-style:none;
	position:relative;
}
#slider li {
	width:900px;
	overflow:hidden;
}	
a.prevBtn,a.nextBtn{
	display: block;
	width: 20px;
	height: 135px;
	background:url(../img/prevnext_btn.gif) no-repeat;
	text-indent: -9999px;
	position: absolute;
	z-index: 99;
}
a.prevBtn{
	bottom: 0;
	left: 0;
}
a.nextBtn{
	bottom: 0;
	right: 0;
	background-position: -20px 0;
}