<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<title>check.html</title>
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="this is my page">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<input type="checkbox" name="checkItems" value="全选/全不选"/>全选/全不选
<input type="checkbox" name="items" value="足球" />足球
<input type="checkbox" name="items" value="篮球"/>篮球
<input type="checkbox" name="items" value="游泳"/>游泳
<input type="checkbox" name="items" value="唱歌"/>唱歌
<input type="button" name="checkall" id="checkall" value="全选" />
<input type="button" name="checkall" id="checkallNo" value="全不选" />
<input type="button" name="checkall" id="check_revsern" value="反选" />
<script language="JavaScript">
document.getElementById("checkall").onclick = checkall;
var items_nodes = document.getElementsByName("items");
for(var i=0; i<items_nodes.length; i++){
items_nodes[i].checked = true;
document.getElementById("checkallNo").onclick = checkallNo;
var items_nodes = document.getElementsByName("items");
for(var i=0; i<items_nodes.length; i++){
items_nodes[i].checked = false;
document.getElementById("check_revsern").onclick = check_revsern;
function check_revsern(){
var items_nodes = document.getElementsByName("items");
for(var i=0; i<items_nodes.length; i++){
if(items_nodes[i].checked == true){
items_nodes[i].checked = false;
items_nodes[i].checked = true;
document.getElementsByName("checkItems")[0].onclick = checkItems;
if(this.checked == true){