*Java*

public class TestCommand extends AJAXCommand {

	public TestCommand(HttpServletRequest request) {
		super(request);
	}

	@Override
	public void execute() {
		setResponse("Test!");
	}
}

*commands.properties file:*

test=com.loomis.ajax.command.TestCommand

*HTML/Javascript*
	
<script>
	var remote = "http://localhost:8081/lspm/AJAXFrontController";
	var ajaxManager = new AjaxWorker(remote, function(response) {
		alert(response);
	});
</script>
		
<input onkeyup="javascript:ajaxManager.sendRequest('cmd=test');"/>