全选案例的测试效果
文昌2018-12-14 14:33:13199<!DOCTYPE html>
<html>
<head>
<title>全选案例</title>
<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') //获取全选
item=document.getElementsByName('item[]') //获取勾选框
for (var i = 0; i < item.length; i++) {
if(checkall.checked){
item[i].checked=true; //当全选被选中时，勾选框选中
}else{
item[i].checked=false; //反之，清空
}
}
}
</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>