全选表单作业
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>全选</title>
<style type="text/css">
.box{width:120px;height:250px;border:1px solid#ccc;border-radius: 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')//获取全选
item=document.getElementsByName("item[]")//获取下面的勾选框
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>