abstract：<!DOCTYPE html><html><head> <title>全選案例</title> <meta charset="utf-8"> <style type="text/css"> .box{
<!DOCTYPE html>
<html>
<head>
<title>全選案例</title>
<meta charset="utf-8">
<style type="text/css">
.box{
width: 120px;
height:250px;
border:1px solid #000;
border-radius: 5px;
padding: 5px 10px;
margin: 20px auto;
}
.box div{
border-bottom: 1px solid #000;
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.getElementsByName("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" >全選</label>
</div>
<input type="checkbox" name="item[]">選項1<br>
<input type="checkbox" name="item[]">選項2<br>
<input type="checkbox" name="item[]">選項3<br>
<input type="checkbox" name="item[]">選項4<br>
<input type="checkbox" name="item[]">選項5<br>
<input type="checkbox" name="item[]">選項6<br>
</div>
</body>
</html>
Correcting teacher：天蓬老師Correction time：2019-04-04 14:31:32
Teacher's summary：全選操作的重點在于理解返回的內容是一組元素,而不是一個, 所以要一個數(shù)組來接收