效果:
[img]http://dl2.iteye.com/upload/attachment/0091/1970/ee045f38-9393-3b27-84a7-d4833e6a11f2.jpg[/img]
[img]http://dl2.iteye.com/upload/attachment/0091/1972/3d8e4e93-8e7f-32b1-92b8-c316e5a7454d.jpg[/img]