本文实例为大家分享了JavaScript实现全选或反选功能的具体代码，供大家参考，具体内容如下
代码如下
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>案例--表格全选</title>
<style>
table {
border: 1px solid;
margin: auto;
width: 500px;
}
td, th {
text-align: center;
border: 1px solid;
}
.out {
background-color: white;
}
.over {
background-color: pink;
}
div{
margin-top: 10px;
text-align: center;
}
</style>
<script>
window.onload = function () {
//全选
document.getElementById("checkAll").onclick = function () {
var cbs = document.getElementsByName("cb");
for (var i = 0; i < cbs.length; i++) {
cbs[i].checked = true;
}
}
//全不选
document.getElementById("unCheckAll").onclick = function () {
var cbs = document.getElementsByName("cb");
for (var i = 0; i < cbs.length; i++) {
cbs[i].checked = false;
}
}
//反选
document.getElementById("reCheck").onclick = function () {
var cbs = document.getElementsByName("cb");
for (var i = 0; i < cbs.length; i++) {
cbs[i].checked = !cbs[i].checked;
}
}
//鼠标经过，颜色变化
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";
}
}
//选中顶部复选框，全选
document.getElementById("firstCb").onclick = function () {
var cbs = document.getElementsByName("cb");
for (var i = 0; i < cbs.length; i++) {
cbs[i].checked = this.checked;
}
}
}
</script>
</head>
<body>
<table>
<caption>学生信息表</caption>
<tr>
<td><input type="checkbox" name="cb" id="firstCb"></td>
<td>编号</td>
<td>姓名</td>
<td>性别</td>
<td>操作</td>
</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);" onclick="delTr(this)">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);" onclick="delTr(this)">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);" onclick="delTr(this)">删除</a></td>
</tr>
</table>
<div>
<input type="button" value="全选" id="checkAll">
<input type="button" value="全不选" id="unCheckAll">
<input type="button" value="反选" id="reCheck">
</div>
</body>
</html>运行结果
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持编程网。
