It's my modify version of a Chinese administrative division seletor demo（省市地区县街道四级联动弹出框）

##References:

• 基于springMvc经过改装的js+ajax的省市地区县街道四级联动弹出框
  http://www.zuidaima.com/share/1780839059049472.htm

##NOTE:

• This is not a very nice modification, but I do it for my company :(
• The city data is old, if you want neweat, please see https://github.com/TooBug/city
• Thanks very much to the author of EasyWorkFrame (see the first item of References).