function openSubNav(nav, l2, span) {
    var leftNavState;
    var nav = $get(nav);
    var l2 = $get(l2);
    var span = $get(span);

    if (nav.className == "nav") {
        nav.className = "nav leftNavOpen";
        l2.style.display = "block";
        leftNavState = "no";
    }
    else if (nav.className != "disabled") {
        nav.className = "nav";
        l2.style.display = "none";
        leftNavState = "yes";
    }

    try {
        if (leftNavState == "no") {
            span.style.backgroundImage = "";
            span.style.backgroundImage = "url(images/icons/iconArrowExpanded.png)";
        }
        else {
            span.style.backgroundImage = "";
            span.style.backgroundImage = "url(images/icons/iconArrowCollapsed.png)";
        }
    } catch (e) { }
    return true;
}