JavaScript小例子：复选框全选
这只是一个小例子，很简单，但是这个功能还是很常用的：
实现后效果如图：
JavaScript代码：
<script type="text/javascript">
function selectAll()
{
var allMails = document.getElementsByName("allMails")[0];
var mails = document.getElementsByName("email"); if(allMails.checked)
{
for(var i = 0; i < mails.length; ++i)
{
mails[i].checked = true;
} }
else
{
for(var i = 0; i < mails.length; ++i)
{
mails[i].checked = false;
}
} }
</script>
JSP页面：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head> <script type="text/javascript">
function selectAll()
{
var allMails = document.getElementsByName("allMails")[0];
var mails = document.getElementsByName("email"); if(allMails.checked)
{
for(var i = 0; i < mails.length; ++i)
{
mails[i].checked = true;
} }
else
{
for(var i = 0; i < mails.length; ++i)
{
mails[i].checked = false;
}
} }
</script> </head> <body>
全选<input type="checkbox" onclick="selectAll()" name="allMails"><br><br><br>
<input type="checkbox" name="email"><br>
<input type="checkbox" name="email"><br>
<input type="checkbox" name="email"><br>
<input type="checkbox" name="email"><br>
<input type="checkbox" name="email"><br>
<input type="checkbox" name="email"><br>
<input type="checkbox" name="email"><br>
</body>
</html>
参考资料
圣思园张龙老师Java Web培训视频。