.scrollup{width:40px;height:40px;position:fixed;bottom:50px;right:100px;display:none;text-indent:-9999px;background:url(images/scroll_top.png) no-repeat;background-size:40px 40px;z-index:9999}@media screen and (max-width:420px){.scrollup{bottom:70px;right:7px}}