#screens{ position:relative;padding: -50px 55px 50px 0px;}
#screens ul, #slider li{margin:0;padding:0;list-style:none;}
#screens li{width:232px;height:140px;overflow:hidden;}
#prevBtn, #nextBtn{display:block;width:18px;height:17px;position:absolute;left:-15px;top:70px;z-index:0}
#nextBtn{left:232px;}
#nextBtn a, 
#prevBtn a{display:block;width:28px;height:27px;background: url(/imgs/t2.png) no-repeat right bottom; text-align:center; font:11px Verdana; line-height:20px;}
#nextBtn a{background:url(/imgs/t1.png) no-repeat right bottom; text-align:center; font:11px Verdana; line-height:20px;}