.carousel-control .glyphicon-chevron-left:before,.carousel-control .glyphicon-chevron-right:before{content:"";}
.carousel-control .glyphicon-chevron-left{background:url(static/images/left1218.png) no-repeat;}
.carousel-control .glyphicon-chevron-right{background:url(static/images/right1218.png) no-repeat;}
.carousel-control:hover .glyphicon-chevron-left{background:url(static/images/left1218-1.png) no-repeat;}
.carousel-control:hover .glyphicon-chevron-right{background:url(static/images/right1218-1.png) no-repeat;}