// functions for chfs

function toggleChfsNav(id)
{
    var minus = '/images/chfs/minus.gif';
    var plus = '/images/chfs/plus.gif';

    div = document.getElementById('chfsnav_div_' + id);
    img = document.getElementById('chfsnav_img_' + id);

    if (div.style.display == 'none') {
        img.src = minus;
        div.style.display = 'block';
    } else {
        img.src = plus;
        div.style.display = 'none';
    }

    return false;
}

function toggle_learnmore() {
    var minus = '/images/chfs/minus_brown.gif';
    var plus = '/images/chfs/plus_brown.gif';

    div = document.getElementById('learnmore');
    img = document.getElementById('img_learnmore');

    if (div.style.display == 'block') {
        img.src = plus;
        div.style.display = 'none';
    } else {
        img.src = minus;
        div.style.display = 'block';
    }

    return false;
}