function CollapseExpand(id, hyperlinkId)
{
    var node = document.getElementById(id);
    var hyperlinkControl = document.getElementById(hyperlinkId);
    if (node.style.display == "none")
    {
        node.style.display = "";
        hyperlinkControl.innerHTML = "-";
    }
    else
    {
        node.style.display = "none";
        hyperlinkControl.innerHTML = "+";
    }
}