<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script type="text/javascript">
function showCity(){
//维护一个二维数组存储省份对应的城市
var citys = [[],["广州","佛山","湛江","中山"],["长沙","衡阳","岳阳","郴州"],["南宁","桂林","贵港","柳州"]];
//获取省份对应的节点
var provinceNode = document.getElementById("province");
// 获取省份选中的选项
var selectIndex = provinceNode.selectedIndex;
// 获取对应的城市
var cityDatas = citys[selectIndex];
// 找到city节点
var cityNode = document.getElementById("city");
// 先要清空city框所有option
/*var children = cityNode.childNodes;
for(var i=0; i<children.length; ){
cityNode.removeChild(children[i]);
}
*/
// 设置option的个数
cityNode.options.length=1;
// 遍历对应的所有城市然后创建对应的option添加到city上
for(var index=0; index<cityDatas.length; index++){
var option = document.createElement("option");
option.innerHTML = cityDatas[index];
cityNode.appendChild(option);
}
}
</script>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<body>
省份<select id="province" onchange="showCity()">
<option>省份</option>
<option>广东</option>
<option>湖南</option>
<option>广西</option>
</select>
城市<select id="city">
<option>城市</option>
</select>
</body>
</html>
城市的联动框
最新推荐文章于 2025-08-13 21:05:35 发布