摘要：<!DOCTYPE html><html><head> <meta charset="utf-8"> <title>全选</title> <style type="text/css"> .box{width:120px;height: 250px;border: 1px s
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>全选</title>
<style type="text/css">
.box{width:120px;height: 250px;border: 1px solid #000;border-radius: 5px;padding: 0px 10px;margin: 20px auto;}
.box div{padding-bottom: 10px;border-bottom: 1px solid #000;margin-bottom: 8px;}
.box input{margin: 8px;}
</style>
<script type="text/javascript">
function checkall() {
var checkall,item;
checkall=document.getElementById('checkall')//获取全选
item=document.getElementsByName('item[]')//获取下面的勾选框
for (var i=0;i<item.length;i++) {
if (checkall.checked) {
item[i].checked=true
}else{
item[i].checked=false
}
}
}
</script>
</head>
<body>
<div class="box">
<div>
<input type="checkbox" id="checkall" onclick="checkall()"><label for="checkall">全选</label>
</div>
<input type="checkbox" name="item[]">选项1<br>
<input type="checkbox" name="item[]">选项2<br>
<input type="checkbox" name="item[]">选项3<br>
<input type="checkbox" name="item[]">选项4<br>
<input type="checkbox" name="item[]">选项5<br>
<input type="checkbox" name="item[]">选项6<br>
</div>
</body>
</html>
批改老师：灭绝师太批改时间：2018-11-12 09:00:39
老师总结：浏览器 f12 查看源码，js的报错会一目了然
