#CSSBox{float:left;width:1170px;height:500px; margin:0 auto;overflow:hidden;}
#CSSBox .box{float:left; margin:10px 10px; background-color: #adadad; width: 330px}

#LeftButton{cursor:hand;margin:5px;height:130px;width:20px;float:left; margin-top: 14%;
  background:url('../images/left.png') center center no-repeat;}
#RightButton{cursor:hand;margin:5px;height:130px;width:20px;float:left; margin-top: 14%;
  background:url('../images/right.png') center center no-repeat;}
#wrapper{width:1170px; margin:0 auto}