var activeMember = 'member1';
function showMember(target) {
    document.getElementById(activeMember).style.display = 'none';
    document.getElementById('list'+activeMember).style.background = '#3F897A';
    document.getElementById(target).style.display = 'block';
    document.getElementById('list'+target).style.background = '#68A192';
    activeMember = target;
    
}