<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>每天一个JavaScript实例-动态省份选择城市</title>
<script>
var citystore = new Array();
citystore = [['SD','济南'],['SD','烟台'],['SD','青岛'],['SX','太原'],['BJ','北京'],['HN','海南']];
window.onload = function(){document.getElementById("state").οnchange=changecity;
}
function changecity(){var state = this.value;var city = document.getElementById('cities');city.options.length = 0;for(var i = 0; i <citystore.length;i++){if(state == citystore[i][0]){var opt =new Option(citystore[i][1]);try{city.add(opt,null);}catch(e){city.add(opt);}}}}
</script></head><body><form id="picker" method="post" action=""><select id = "state"><option value="">--</option><option value="SD">山东</option><option value="SX">山西</option><option value="BJ">北京</option><option value="HN">海南</option></select><select id="cities"></select></form></body>
</html>
转载于:https://www.cnblogs.com/blfshiye/p/5059188.html
