#back-top-right{position:fixed;bottom:10px;right:0;display:none;z-index:9999}#back-top-right a{width:55px;display:block;margin-right:10px;text-align:center;-webkit-transition:.2s;-moz-transition:.2s;transition:.2s}#back-top-right span{width:55px;height:50px;display:block;background:#1e69de url(../images/haut.png) no-repeat center center;opacity:.3;-webkit-border-radius:5px;-moz-border-radius:5px;border-radius:5px;-webkit-transition:.2s;-moz-transition:.2s;transition:.2s}#back-top-right a:hover span{background-color:#81b510;opacity:1}