checkAllBoxes.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>全选和全不选</title>
<script type="text/javascript">
function checkAll() {
//获取编号前面的复选框
var checkAllEle = document.getElementById("checkAll");
//对编号前面复选框的状态进行判断
if(checkAllEle.checked==true) {
//获取下面所有的复选框
var checkOnes = document.getElementsByName("checkOne");
//遍历复选框集合
for(var i=0; i<checkOnes.length; i++) {
//拿到每一个复选框，并将其状态改为选中
checkOnes[i].checked=true;
}
} else {
//获取下面所有的复选框
var checkOnes = document.getElementsByName("checkOne");
//遍历复选框集合
for(var i=0; i<checkOnes.length; i++) {
//拿到每一个复选框，并将其状态改为未选中
checkOnes[i].checked=false;
}
}
}
</script>
</head>
<body>
<table border="1" width="500" height="50" align="center" >
<thead>
<tr>
<td colspan="4">
<input type="button" value="添加" />
<input type="button" value="删除" />
</td>
</tr>
<tr>
<th><input id="checkAll" οnclick="checkAll()" type="checkbox"/></th>
<th>编号</th>
<th>姓名</th>
<th>年龄</th>
</tr>
</thead>
<tbody>
<tr >
<td><input name="checkOne" type="checkbox"/></td>
<td>1</td>
<td>张三</td>
<td>22</td>
</tr>
<tr >
<td><input name="checkOne" type="checkbox" /></td>
<td>2</td>
<td>李四</td>
<td>25</td>
</tr>
<tr >
<td><input name="checkOne" type="checkbox" /></td>
<td>3</td>
<td>王五</td>
<td>27</td>
</tr>
<tr >
<td><input name="checkOne" type="checkbox" /></td>
<td>4</td>
<td>赵六</td>
<td>29</td>
</tr>
<tr >
<td><input name="checkOne" type="checkbox" /></td>
<td>5</td>
<td>田七</td>
<td>30</td>
</tr>
<tr >
<td><input name="checkOne" type="checkbox" /></td>
<td>6</td>
<td>汾九</td>
<td>20</td>
</tr>
</tbody>
</table>
</body>
</html>
