.aba_cinza {
	background-image:url(../img/botoes_aba/cinza.gif);
	background-repeat:no-repeat;
	background-position:bottom;
	cursor:pointer;
}
.aba_laranja {
	background-image:url(../img/botoes_aba/laranja.gif);
	background-repeat:no-repeat;
	background-position:top;
}