docs: public void doBack(String command)
  	{
  		if (command != null)
  			if (command.startsWith("#"))
  				command = command.substring(1);
  		String javaCommand = this.popHistory(2, false);		// Current command
  		Util.getLogger().info("Browser back: java command=" + javaCommand + "  browser command=" + command);
  		if (javaCommand == null)
  			javaCommand = command;
  		if ((javaCommand == null) || (javaCommand.length() == 0))
  			javaCommand = this.getInitialCommand(false);
  		javaCommand = this.cleanCommand(javaCommand);
  		javaCommand = UrlUtil.addURLParam(javaCommand, Params.APPLET, this.getClass().getName());
  		Util.getLogger().info("doBack " + javaCommand);
  		BaseApplet.handleAction(javaCommand, this, this, Constants.DONT_PUSH_TO_BROWSER);
  	}