全国三级城市联动Js版，因为全国城市信息一般不会怎么变，不是说经常会变更地名，所以把全国城市、地市名称信息写进了Js里，这样加载更快，免去了使用数据库的负担。大家修改的时候只用打开area.js进行修改就行了，调用的方法可查看selectArea.html，里面演示的很清楚了，再此不多说了，有用的就下载吧。绝对是一个实用的网页小模块。(Three cities nationwide linkage Js version, because the information is generally not how cities across the country change, not to say that often change names, so the cities across the country, city name information written into the Js, the so loaded faster, eliminating the need to use the　burden. When we modify only open area.js modified on the line, the method call to see selectArea.html, which demonstrates very clearly, then this is not much to say, useful to download it. Definitely a practical web of small modules.)