<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<script language="JavaScript">
function getcity(element){
var pro=element.value;
var city = document.getElementById("city");
switch (pro){
case "请选择省份":
city.length=0;
city.appendChild(new Option("请选择城市"));
break;
case "河南省":
city.length=0;
city.appendChild(new Option("濮阳市","py"));
city.appendChild(new Option("郑州市","zz"));
city.appendChild(new Option("鹤壁市","hb"));
break;
case "湖北省":
city.length=0;
city.appendChild(new Option("武汉","wh"));
city.appendChild(new Option("武昌","wc"));
break;
case "广东省":
city.length=0;
city.appendChild(new Option("惠州市","hz"));
city.appendChild(new Option("深圳市","sz"));
city.appendChild(new Option("东莞市","dg"));
break;
}
}
</script>
</head>
<body>
<select onchange="getcity(this)">
<option>请选择省份</option>
<option>河南省</option>
<option>湖北省</option>
<option>广东省</option>
</select>
<select id="city">
<option>请选择城市</option>
</select>
</body>
</html>
JavaScript----下拉框二级联动效果
版权声明：一心不安 https://blog.csdn.net/qq_42700595/article/details/83443917
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