var g_pHelpWindow = null;

function OpenHelpWindow(strNodeName)
{
  g_pHelpWindow = window.open("tests/" + strNodeName + ".html",
    "helpwin", "width=300,height=350,location=0,menubar=0,scrollbars=1,toolbar=0");
  g_pHelpWindow.focus();
}

function CloseHelpWindow()
{
  if (g_pHelpWindow != null && !g_pHelpWindow.closed)
  {
    g_pHelpWindow.close();
    g_pHelpWindow = null;
  }
}