#cabecera {
	background: url(../i/cabecera_metros.jpg) top left no-repeat;
}
#socios{
	width:468px;
	margin:70px auto;
}
#socios a{
	display:block;
	float:left;
	margin-right:20px;
	text-indent:-4000px;
	text-decoration:none;
	width:136px; 
	height:55px;
	border:0;
}

#alsa{
	background: transparent url(../i/logo_alsa.jpg) no-repeat;
}
#cajaMadrid{
	background: transparent url(../i/logo_cajamadrid.jpg) no-repeat;
}
#metroMadrid{
	background: transparent url(../i/logo_metromadrid.jpg) no-repeat;
	margin-right:0;
}