abstract：<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0">&
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>全选</title>
<style type="text/css">
.box{width: 120px;height: 250px;border: 1px solid #000000;border-radius: 5px 10px;margin: 20px auto;}
.box div{border-bottom: 1px solid #000000;padding-bottom: 10px;margin-bottom: 8px}
.box input{margin: 8px;}
</style>
<script>
function checkall(){
var checkall,item;
checkall=document.getElementById('checkall')
item=document.getElementsByName("item[]")
for(var i=0;i<item.length;i=i+1){
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>
Correcting teacher：韦小宝Correction time：2019-02-21 17:18:39
Teacher's summary：全选在实际的开发中不管是网站的前台还是网站的后台使用的次数都很多 所以一定要好好掌握!