📄 formoperate.htm
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>
testForm
</title>
<script language="JavaScript">
<!--
function changecity(select1){
var select2=select1.form.district;
select2.length=0;
var cityoption=select1.options[select1.selectedIndex];
var cityname=cityoption.value;
if (cityname=='beijing'){
select2.options[0]=new Option("HaiDian","haidian");
select2.options[1]=new Option("ChaoYang","chaoyang");
select2.options[2]=new Option("DongCheng","dongcheng");
select2.options[3]=new Option("XiCheng","xicheng");
select2.options[4]=new Option("XuanWu","xuanwu");
select2.options[5]=new Option("ChongWen","chongwen");
}
if (cityname=='tianjin'){
select2.options[0]=new Option("HePing","heping");
select2.options[1]=new Option("HeXi","hexi");
select2.options[2]=new Option("HeDong","hedong");
select2.options[3]=new Option("NanKai","nankai");
select2.options[4]=new Option("HongQiao","hongqiao");
}
}
-->
</script>
</head>
<body>
<form >
City:
<select name="city" onChange="changecity(this)">
<option value="tianjin">TianJin
<option value="beijing">BeiJing
</select>
<br>
District:
<select name="district">
</select>
<br>
<input type="submit" value="Submit">
<input type="reset" value="Reset">
</form>
</body>
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