abstract：<!DOCTYPE html><html><head><meta charset="UTF-8"><title>Document</title><style type="text/css">#box{width:100px;height:200px;border:1px so
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
#box{
width:100px;
height:200px;
border:1px solid #000;
margin:50px auto;
padding:10px;
}
#box div{
border-bottom:1px solid #000;
padding-bottom:10px;
}
</style>
</head>
<body>
<div id="box">
<div><input type="checkbox" id="checkall" onclick="checkAll();"><label for="checkall">全选</label></div>
<input type="checkbox" name="item"><label>项目1</label><br>
<input type="checkbox" name="item"><label>项目1</label><br>
<input type="checkbox" name="item"><label>项目1</label><br>
<input type="checkbox" name="item"><label>项目1</label><br>
<input type="checkbox" name="item"><label>项目1</label><br>
<input type="checkbox" name="item"><label>项目1</label><br>
</div>
<script type="text/javascript">
function checkAll(){
var checkall=document.getElementById('checkall');
var 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>
</body>
</html>
Correcting teacher：查无此人Correction time：2019-03-25 09:29:36
Teacher's summary：完成的不错。js操作可以让页面动起来，你现在应该越学越开心。继续加油