#barrausp {
    	background-image:url("http://www.revistas.usp.br/wp/wp-content/themes/sibi-revistas/images/right_Logo_usp_BG.gif");
    	background-repeat:repeat-x;
    	height: 37px;
}
.BarraDireita{
    	float: right;
}

.BarraEsquerda{
    	float: left;
}