function monta_calendario(campo_destino,nome_botao) {
	Calendar.setup({
		inputField     :    campo_destino,      // id of the input field
		ifFormat       :    "dd/mm/y",       // format of the input field
		button         :    nome_botao,   // trigger for the calendar (button ID)
		singleClick    :    false            // double-click mode
	});
}