var currentStaff = 'staff2009';
var currentIssue = 'issue17_2';

function arrow(id) {
    var elt = document.getElementById(id);
    elt.style.color = 'white';
}

function unArrow(id) {
    var elt = document.getElementById(id);
    elt.style.color = '#330099';
}

function switchStaff(showStaff) {
    var elt = document.getElementById(currentStaff);
    elt.style.display = 'none';
    elt = document.getElementById(showStaff);
    elt.style.display = 'inline';
    currentStaff = showStaff;
    return true;
}

function switchIssue(showIssue) {
    var elt = document.getElementById(currentIssue);
    elt.style.display = 'none';
    elt = document.getElementById(showIssue);
    elt.style.display = 'inline';
    currentIssue = showIssue;
    return true;
}