function MostraDiaEmenta(which) {
    document.getElementById('diaSabado').style.display="none";
    document.getElementById('diaDomingo').style.display="none";
    document.getElementById('diaSegunda').style.display="none";
    document.getElementById('diaTerca').style.display="none";
    document.getElementById('diaQuarta').style.display="none";
    document.getElementById('diaQuinta').style.display="none";
    document.getElementById('diaSexta').style.display="none";
    document.getElementById(which).style.display="block";
}