.backToTop{bottom:40px;color:#000;font:12px Arial;position:fixed;text-align:center;text-decoration:none;right:20px;z-index:2222;-moz-transition:opacity .2s linear;-o-transition:opacity .2s linear;-webkit-transition:opacity .2s linear;transition:opacity .2s linear}.backToTop.fadein{filter:progid:DXImageTransform.Microsoft.Alpha(enabled=false);opacity:1}.backToTop.fadeout{filter:alpha(opacity=0);opacity:0}