abstract：<!DOCTYPE html><html><head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>JavaScrip-—t全选</tit
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>JavaScrip-—t全选</title>
<style type="text/css">
.box{width: 120px;height: 250px;border: 1px solid #ccc;border-radius: 5px;padding: 5px 10px;margin: 20px auto;}
.box div{border-bottom: 1px solid #ccc;padding-bottom: 10px;margin-bottom: 8px;}
.box input{margin: 8px;}
</style>
<script type="text/javascript">
function checKAll(){
var checkall,item;
checkall=document.getElementById("checkall")
item=document.getElementsById("item[]")
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" nama="item[]">选项1<br>
<input type="checkbox" nama="item[]">选项2<br>
<input type="checkbox" nama="item[]">选项3<br>
<input type="checkbox" nama="item[]">选项4<br>
<input type="checkbox" nama="item[]">选项5<br>
<input type="checkbox" nama="item[]">选项6<br>
</div>
</body>
</html>
Correcting teacher：天蓬老师Correction time：2018-12-16 19:45:56
Teacher's summary：全选功能, 重点有二个, 复选框的name属性必须全部一样, 并且 要写成数组的形式