用于注册选项中的三级下拉菜单，可用于地区选项，或其它选项，是用Dreamwaver写的-Drop-down menu is for system registered,and for write by dreamwaver and javascr ipt, it is also can use for anther area.

html界面网页设计的例子，用dreamwaver实现，适合初学者；-Examples of web design html interface with dreamwaver achieve for beginners