最近学了一个关于省市级联简单的小例子，贴出来与大家分享一下：
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>index</title> </head> <body> <select onchange="changeCity()"> <option>请选择省份</option> </select> <select> <option>请选择城市</option> </select> <script> function $(ID){ return document.getElementById(ID); } var cityList=new Array(); cityList['北京市']=['东城区','西城区','昌平区']; cityList['河北省']=['保定','石家庄','定州']; cityList['江苏省'] = ['南京市','苏州市','无锡市']; cityList['浙江省'] = ['杭州市','宁波市','温州市']; cityList['四川省'] = ['四川省','成都市']; cityList['海南省'] = ['海口市']; function changeCity(){ var province=$("selProvince").value; var city=$("selCity"); city.options.length=0; for (var i in cityList) { if(i==province){ for (var j in cityList[i]) { city.add(new Option(cityList[i][j],cityList[i][j]),null); } } } } function allCity(){ var province=$("selProvince"); for (var i in cityList) { province.add(new Option(i,i),null); } } window.onload=allCity; </script> </body> </html>