三级联动

HTML

<select name="" id="province"></select>
<select name="" id="city"></select>
<select name="" id="county"></select>

JavaScript

var arrCity =
[
			{ name:"请选择", sub:[{name:"请选择"}], type:1},
		   {
  name:"北京",
  sub:[{name:"请选择"},{name:"东城区"},{name:"西城区"},{name:"崇文区"},{name:"宣武区"},{name:"朝阳区"},{name:"海淀区"},{name:"丰台区"},{name:"石景山区"},{name:"房山区"},{name:"通州区"},{name:"顺义区"},{name:"昌平区"},{name:"大兴区"},{name:"怀柔区"},{name:"平谷区"},{name:"门头沟区"},{name:"密云县"},{name:"延庆县"},{name:"其他"}],
    type:0
      },
 {
  name:"广东",
  sub:[{name:"请选择",sub:[]},
	   {
  name:"广州",
  sub:[{name:"请选择"},{name:"越秀区"},{name:"荔湾区"},{name:"海珠区"},{name:"天河区"},{name:"白云区"},{name:"黄埔区"},{name:"番禺区"},{name:"花都区"},{name:"南沙区"},{name:"萝岗区"},{name:"增城市"},{name:"从化市"},{name:"其他"}],
    type:0
      },
		   {
  name:"深圳",
  sub:[{name:"请选择"},{name:"福田区"},{name:"罗湖区"},{name:"南山区"},{name:"宝安区"},{name:"龙岗区"},{name:"盐田区"},{name:"其他"}],
    type:0
      },
		   {
  name:"珠海",
  sub:[{name:"请选择"},{name:"香洲区"},{name:"斗门区"},{name:"金湾区"},{name:"其他"}],
    type:0
      },
		   {
  name:"汕头",
  sub:[{name:"请选择"},{name:"金平区"},{name:"濠江区"},{name:"龙湖区"},{name:"潮阳区"},{name:"潮南区"},{name:"澄海区"},{name:"南澳县"},{name:"其他"}],
    type:0
      },
		   {
  name:"韶关",
  sub:[{name:"请选择"},{name:"浈江区"},{name:"武江区"},{name:"曲江区"},{name:"乐昌市"},{name:"南雄市"},{name:"始兴县"},{name:"仁化县"},{name:"翁源县"},{name:"新丰县"},{name:"乳源瑶族自治县"},{name:"其他"}],
    type:0
      },
		   {
  name:"佛山",
  sub:[{name:"请选择"},{name:"禅城区"},{name:"南海区"},{name:"顺德区"},{name:"三水区"},{name:"高明区"},{name:"其他"}],
    type:0
      },
		   {
  name:"江门",
  sub:[{name:"请选择"},{name:"蓬江区"},{name:"江海区"},{name:"新会区"},{name:"恩平市"},{name:"台山市"},{name:"开平市"},{name:"鹤山市"},{name:"其他"}],
    type:0
      },
		   {
  name:"湛江",
  sub:[{name:"请选择"},{name:"赤坎区"},{name:"霞山区"},{name:"坡头区"},{name:"麻章区"},{name:"吴川市"},{name:"廉江市"},{name:"雷州市"},{name:"遂溪县"},{name:"徐闻县"},{name:"其他"}],
    type:0
      },
		   {
  name:"茂名",
  sub:[{name:"请选择"},{name:"茂南区"},{name:"茂港区"},{name:"化州市"},{name:"信宜市"},{name:"高州市"},{name:"电白县"},{name:"其他"}],
    type:0
      },
		   {
  name:"肇庆",
 ...