var g_sUnLoadMessage = '';

function SetUnloadMessage(psUnloadMessage)
{
  g_sUnLoadMessage = psUnloadMessage;
}

function SetConfirmUnload(pbWithMessage)
{
  if (pbWithMessage)
  {
    window.onbeforeunload = function()
    {
      return g_sUnLoadMessage;
    };
  }
  else
    window.onbeforeunload = null;
}