div.ubuttons {
	/* desativar selecao */
	user-select: none;
	-moz-user-select: none;
	-webkit-user-select: none;
	cursor: default;
}

button.ubutton_unit.ubutton_disabled {
	-webkit-filter: grayscale(100%);
	-moz-filter: grayscale(100%);
	-ms-filter: grayscale(100%);
	-o-filter: grayscale(100%);
	filter: grayscale(100%);
	filter: gray; /* IE 6-9 */
}