dwr.engine.defaultErrorHandler = function(message, ex) {
    dwr.engine._debug("Error: " + ex.name + ", " + ex.message, true);
    if (message == null || message == "") alert("A server error has occurred.");
    // Ignore NS_ERROR_NOT_AVAILABLE if Mozilla is being narky
    else if (message.indexOf("0x80040111") != -1) dwr.engine._debug(message);
    else 
    {
        if(message != "Failed to read input")
        {
            alert(message);
        }
    }
  };