function getPaneDocument(pane)
{
    //obtain reference to the parent page
    var splitterPageWnd = window.parent;
    //call a method from the parent page
    var splitterObject = splitterPageWnd.GetRadSplitter();
    var paneObject = splitterObject.getPaneById(pane);
    var topPaneContent = paneObject.getContentElement();
    return topPaneContent.ownerDocument;
}