@media only screen and (max-width: 1200px){#top_button{position:fixed;bottom:20px;right:20px}#content_left{width:100%}}@media only screen and (min-width: 1200px){#content_left{float:left;width:33%;top:0;position:fixed}#content_right{float:right;width:66%}#top_button{display:none}}