#cabecera {border-bottom: 5px solid #c1c1c1;}

* html #cabecera {
	border-bottom: 5px solid #c1c1c1;
}

*:first-child+html #cabecera {
border-bottom: 5px solid #c1c1c1;
}

#cabecera h1 {background-image:url(/img/cab_viajeros.jpg);}

* html #cabecera h1 {background-image:url(/img/cab_viajeros.jpg);}
*:first-child+html #cabecera h1 {background-image:url(/img/cab_viajeros.jpg);}