<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div>
<input type="button" value="全选" ondblclick="ChooseAll();">
<input type="button" value="取消" ondblclick="CancelAll();">
<input type="button" value="反选" ondblclick="TrunAll();">
</div>
<div>
<table>
<thead>
<tr>
<th>序号</th>
<th>用户</th>
<th>年龄</th>
</tr>
</thead>
<tbody id="c1">
<tr >
<td ><input class="i1" type="checkbox"/></td>
<td>alex</td>
<td>18</td>
</tr>
<tr>
<td ><input class="i1" type="checkbox"/></td>
<td>alex</td>
<td>18</td>
</tr>
<tr >
<td ><input class="i1" type="checkbox"/></td>
<td>alex</td>
<td>18</td>
</tr>
</tbody>
</table>
</div>
<script>
function ChooseAll() {
var td= document.getElementById('c1');
var doc = td.getElementsByClassName('i1');
for(var i=0;i<doc.length;i++){
var current = doc[i];
current.checked = true;
}
}
function CancelAll() {
var td= document.getElementById('c1');
var doc = td.getElementsByClassName('i1');
for(var i=0;i<doc.length;i++) {
var current = doc[i];
current.checked = false;
}
}
function TrunAll() {
var td= document.getElementById('c1');
var doc = td.getElementsByClassName('i1');
for(var i=0;i<doc.length;i++) {
var current = doc[i];
if (current.checked){
current.checked = false;
}else {
current.checked = true;
}
}
}
</script>
</body>
</html>
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