function togglePannelStatus(content)
{
    var expand = (content.style.display == "none");
    content.style.display = (expand ? "block" : "none");
    var chevron = content.parentNode
        .firstChild.childNodes[1].childNodes[0];
    chevron.src = chevron.src
        .split(expand ? "expand.gif" : "collapse.gif")
        .join(expand ? "collapse.gif" : "expand.gif");
}