#sidebar #ads{padding-top:0}
#onthispage{display:none}
div#container:after{content:""; display:table; clear:both}
@media screen and (max-width:749px){
#container{margin:0;max-width:749px}
#sidebar{float:left;width:130px}
#extra{float:right;width:calc(100% - 130px)}
#footer{clear:both;width:100%}
}
@media only screen and (min-width:750px){
#container{margin:0;max-width:750px}
#content{float:right;width:calc(100% - 130px)}
#sidebar{float:left;width:130px}
#extra{clear:both;width:100%}
}