select标签的相关操作，选中，获取option的值，二级联动
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script type="text/javascript" src="./js/jquery-1.11.2.min.js"></script>
<script>
function selectAllOptionVal() {
var str = "";
$("#select-option-one option").each(function(i) {
var v = $(this).val();
str = str + "\n" + v;
});
alert(str);
}
function selectedOptionVal() {
var s = $("#select-option-one").val();
alert(s);
}
function noSelectedOptionVal() {
var str = '';
$("#select-option-one option").each(function(i) {
if (!$(this).is(":selected")) {
str = str + "\n" + $(this).val();
}
});
alert(str);
}
function oneToTwo() {
v = $("#select-option-one").val();
/*
//获取被选中的参数作为值可以异步获取数据
$.ajax({
});
*/
//为第二级加载数据
//先清空上一次加载的内容
$("[name='select-option-two-option']").remove();
//以下是例子的数据
var arr = new Array(5, 6, 7, 8, 9, 10);
//拼接的html
var str = "";
for (var i = 0; i < arr.length; i++) {
str = str
+ "<option name='select-option-two-option' value='"+arr[i]+"'>"
+ arr[i] + "</option>";
}
//为第二级select添加内容
$("#select-option-two").append(str);
}
</script>
</head>
<body>
<table>
<tr>
<td><select id="select-option-one" onchange="oneToTwo();">
<option value='1'>1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value='5'>5</option>
</select> <select id="select-option-two">
</select></td>
<td>
<button onclick="selectAllOptionVal();">获取所有option的值</button>
<button onclick="selectedOptionVal();">获取选中option的值</button>
<button onclick="noSelectedOptionVal();">获取所有未被选中的值</button>
</td>
</tr>
</table>
</body>
</html>
