<!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: white;
}
.over {
background-color: pink;
}
</style>
<script>
/**
* 分析：
* 1.全选
* 获取所有的checkbox
* 遍历cb，设置每一个cb的状态为选中checked
*/
//在页面加载完后绑定事件
window.onload = function () {
//给全选按钮绑定单机事件
document.getElementById("selectAll").onclick = function () {
//全选
//获取所有的checkbox
var cbs = document.getElementsByName("cb");
//遍历
for (var i = 0; i < cbs.length; i++) {
//设置每一个cb的状态为选中
cbs[i].checked = true;
}
};
document.getElementById("unSelectAll").onclick = function () {
//全不选
//获取所有的checkbox
var cbs = document.getElementsByName("cb");
//遍历
for (var i = 0; i < cbs.length; i++) {
//设置每一个cb的状态为不选中
cbs[i].checked = false;
}
};
document.getElementById("selectRev").onclick = function () {
//反选
//获取所有的checkbox
var cbs = document.getElementsByName("cb");
//遍历
for (var i = 0; i < cbs.length; i++) {
//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++) {
//移道元素之上
trs[i].onmouseover = function () {
this.classList = "over";
};
//移出
trs[i].onmouseout = function () {
this.classList = "out";
};
}
};
</script>
</head>
<body>
<table>
<caption>学生信息表</caption>
<tr>
<th><input id="firstCb" name="cb" type="checkbox"></th>
<th>编号</th>
<th>姓名</th>
<th>性别</th>
<th>操作</th>
</tr>
<tr>
<td><input name="cb" type="checkbox"></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 name="cb" type="checkbox"></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 name="cb" type="checkbox"></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 id="selectAll" type="button" value="全选">
<input id="unSelectAll" type="button" value="全不选">
<input id="selectRev" type="button" value="反选">
</div>
</body>
</html>
