.logo { background: url(/images/nou/banners/banner-principal.jpg) }
.logo2008 { background: url(/images/nou/banners/banner-principal2008.jpg) }
.logo2009 { background: url(/images/nou/banners/banner-principal2009.jpg) }
.logo2010 { background: url(/images/nou/banners/banner-principal2010.jpg) }
.logo2011 { background: url(/images/nou/banners/banner-principal2011.jpg) }
.logo2012 { background: url(/images/nou/banners/banner-principal2012.jpg) }
.logo2013 { background: url(/images/nou/banners/banner-principal2013.jpg) }