#wrapper {width:600px; margin:75px auto}

#slider {float:left; position:relative; overflow:auto; width:600px; height:150px; border:2px solid #fff; background:#fff;margin:0; padding:0}
#slider ul {position:absolute; list-style:none; top:1px; left:3px;margin:0; padding:0}
#slider li {float:left; width:600px; height:150px; padding-right:10px;margin:0; padding:0}