._f_greca {
	background-image: url(../imagen/greca.png);
	background-repeat: no-repeat;
	background-position: center center;
}
._f_blanco1 {
	background-image: url(../imagen/grec_rosa_top.gif);
	background-repeat: no-repeat;
	background-position: right top;
}
._f_blanco2 {
	background-image: url(../imagen/grec_rosa_bot.gif);
	background-repeat: no-repeat;
	background-position: left bottom;
}
._f_verde {
	background-attachment: fixed;
	background-image: url(../imagen/barra_verde_fondo.gif);
	background-repeat: repeat-x;
	background-position: left top;
}