function showHide(a, b, c) {
    document.getElementById(a).style.display = 'inline';
    document.getElementById(b).style.display = 'none';
    document.getElementById(c).style.display = 'none';
    document.getElementById(a + 't').className = 'Active';
    document.getElementById(b + 't').className = '';
    document.getElementById(c + 't').className = '';
}