<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>表格全选</title>
<style>
table{
border: 1px solid;
width: 500px;
margin-left: 30%;
}
td,th{
text-align: center;
border: 1px solid;
}
div{
margin-top: 10px;
margin-left: 30%;
}
.out{
background-color: aqua;
}
.over{
background-color: pink;
}
</style>
<script>
//1.在页面加载完后绑定事件
window.onload=function () {
//2.给全选按钮绑定单击事件
document.getElementById("selectAll").onclick=function () {
//全选
//1.获取所有的checkbox
var cbs=document.getElementsByName("cb");
//2.遍历
for(var i=0;i<cbs.length;++i){
cbs[i].checked=true;
}
}
document.getElementById("unselectAll").onclick=function () {
//全不选
//1.获取所有的checkbox
var cbs = document.getElementsByName("cb");
//2.遍历
for (var i = 0; i < cbs.length; i++) {
//3.设置每一个cb的状态为未选中 checked
cbs[i].checked = false;
}
}
document.getElementById("selectRev").onclick=function () {
//反选
//1.获取所有的checkbox
var cbs = document.getElementsByName("cb");
//2.遍历
for (var i = 0; i < cbs.length; i++) {
//3.设置每一个cb的状态为相反
cbs[i].checked = !cbs[i].checked;
}
}
var trs=document.getElementsByTagName("tr");
for(var i=0;i<trs.length;++i){
trs[i].onmouseover=function () {
this.className="over";
}
trs[i].onmouseout=function () {
this.className="out";
}
}
}
</script>
</head>
<body>
<table>
<caption>学生信息表</caption>
<tr>
<th><input type="checkbox" name="cb" id="firstCb"></th>
<th>编号</th>
<th>姓名</th>
<th>性别</th>
<th>操作</th>
</tr>
<tr>
<td><input type="checkbox" name="cb" ></td>
<td>1</td>
<td>令狐冲</td>
<td>男</td>
<td><a href="javascript:void(0);">删除</a></td>
</tr>
<tr>
<td><input type="checkbox" name="cb" ></td>
<td>2</td>
<td>任我行</td>
<td>男</td>
<td><a href="javascript:void(0);">删除</a></td>
</tr>
<tr>
<td><input type="checkbox" name="cb" ></td>
<td>3</td>
<td>岳不群</td>
<td>?</td>
<td><a href="javascript:void(0);">删除</a></td>
</tr>
</table>
<div>
<input type="button" id="selectAll" value="全选">
<input type="button" id="unselectAll" value="全不选">
<input type="button" id="selectRev" value="反选">
</div>
</body>
</html>
原文：https://www.cnblogs.com/dss-99/p/14843192.html