全选框的代码实现
昕旸2019-04-03 11:35:45208<!DOCTYPE html>
<html >
<head>
<meta charset="UTF-8">
<title>QuanXuan</title>
<style type ="text/css">
.box {width:120px; height:250px;border:1px solid black;border-radius: 5px;padding: 5px 10px;margin:20px auto;}
.box div{border-bottom: 1px solid black;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">全选</label>
</div>
<input type="checkbox" name="item[]">选项A<br>
<input type="checkbox" name="item[]">选项B<br>
<input type="checkbox" name="item[]">选项C<br>
<input type="checkbox" name="item[]">选项D<br>
<input type="checkbox" name="item[]">选项E<br>
<input type="checkbox" name="item[]">选项F<br>
</div>
</body>
</html>