我想要得到下拉框的值,并修改在前面定义的<! int time=1;>的值,该如何修改
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<html>
<head>
<title>Title</title>
</head>
<%! int time=1; %>
<script >
$(function(){
var select = document.getElementById("select");
select.onchange = function(){
}
})
</script>
<body>
请选择签到时间(分钟)
<select id="select">
<option value="1">1</option>
<option value="2">2</option>
<option value="5">5</option>
<option value="10">10</option>
</select>
</body>
</html>