1 <div id="divArea">2   <select data-bind="options: CityArray,optionsText: ‘AreaName‘,optionsValue: ‘AreaID‘,value: selectedCityAreaID,optionsCaption: ‘请选择‘,event:{ change: changeCity}"></select>3   <select data-bind="options: nowChild,optionsText: ‘AreaName‘,optionsValue: ‘AreaID‘,optionsCaption: ‘请选择‘"></select>4 </div>

 1             //定义区县列表 2             var coutryArray = [ 3             { 4                 FatherAreaID: "330100", 5                 Childs: [ 6                     { AreaName: ‘市辖区‘, AreaID: ‘330101‘ }, 7                     { AreaName: ‘上城区‘, AreaID: ‘330102‘ }, 8                     { AreaName: ‘下城区‘, AreaID: ‘330103‘ }, 9                     { AreaName: ‘江干区‘, AreaID: ‘330104‘ },10                     { AreaName: ‘拱墅区‘, AreaID: ‘330105‘ },11                     { AreaName: ‘西湖区‘, AreaID: ‘330106‘ },12                     { AreaName: ‘滨江区‘, AreaID: ‘330108‘ },13                     { AreaName: ‘萧山区‘, AreaID: ‘330109‘ },14                     { AreaName: ‘余杭区‘, AreaID: ‘330110‘ },15                     { AreaName: ‘桐庐县‘, AreaID: ‘330122‘ },16                     { AreaName: ‘淳安县‘, AreaID: ‘330127‘ },17                     { AreaName: ‘建德市‘, AreaID: ‘330182‘ },18                     { AreaName: ‘富阳市‘, AreaID: ‘330183‘ },19                     { AreaName: ‘临安市‘, AreaID: ‘330185‘ }20                 ]21             },22             {23                 FatherAreaID: "330200",24                 Childs: [25                     { AreaName: ‘市辖区‘, AreaID: ‘330201‘ },26                     { AreaName: ‘海曙区‘, AreaID: ‘330203‘ },27                     { AreaName: ‘江东区‘, AreaID: ‘330204‘ },28                     { AreaName: ‘江北区‘, AreaID: ‘330205‘ },29                     { AreaName: ‘北仑区‘, AreaID: ‘330206‘ },30                     { AreaName: ‘镇海区‘, AreaID: ‘330211‘ },31                     { AreaName: ‘鄞州区‘, AreaID: ‘330212‘ },32                     { AreaName: ‘象山县‘, AreaID: ‘330225‘ },33                     { AreaName: ‘宁海县‘, AreaID: ‘330226‘ },34                     { AreaName: ‘余姚市‘, AreaID: ‘330281‘ },35                     { AreaName: ‘慈溪市‘, AreaID: ‘330282‘ },36                     { AreaName: ‘奉化市‘, AreaID: ‘330283‘ }37                 ]//其他的市省略38             }];39             var modelArea = {40                 CityArray: [41                     { AreaName: ‘杭州市‘, AreaID: ‘330100‘ },42                     { AreaName: ‘宁波市‘, AreaID: ‘330200‘ },43                     { AreaName: ‘温州市‘, AreaID: ‘330300‘ },44                     { AreaName: ‘嘉兴市‘, AreaID: ‘330400‘ },45                     { AreaName: ‘湖州市‘, AreaID: ‘330500‘ },46                     { AreaName: ‘绍兴市‘, AreaID: ‘330600‘ },47                     { AreaName: ‘金华市‘, AreaID: ‘330700‘ },48                     { AreaName: ‘衢州市‘, AreaID: ‘330800‘ },49                     { AreaName: ‘舟山市‘, AreaID: ‘330900‘ },50                     { AreaName: ‘台州市‘, AreaID: ‘331000‘ },51                     { AreaName: ‘丽水市‘, AreaID: ‘331100‘ }52                 ],53                 selectedCityAreaID: ko.observable(),54                 nowChild: ko.observableArray(),55                 changeCity: function () {56                     for (var i = 0, length = coutryArray.length; i < length; i++) {57                         if (coutryArray[i].FatherAreaID == this.selectedCityAreaID()) {58                             this.nowChild(coutryArray[i].Childs);59                         }60                     }61                 }62         };63         ko.applyBindings(modelArea, $("#divArea")[0]);