function expandCollapse(id, captionShow, captionHide)
{
    if (document.getElementById(id).style.cssText == "")
    { 
        document.getElementById(id).style.cssText = "display:none;";
        document.getElementById(id + "_toggle").innerHTML = "<span class=\"grey\">[</span><span class=\"blue\">+</span><span class=\"grey\">]</span> <a>" + captionShow + "</a></span>";
    }
    else
    { 
        document.getElementById(id).style.cssText = "";
        document.getElementById(id + "_toggle").innerHTML = "<span class=\"grey\">[</span><span class=\"blue\">-</span><span class=\"grey\">]</span> <a>" + captionHide + "</a></span>";
    }
}