摘要：<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>全选</title> <style> .box{ width:100px; height: 250px; border:1px soli
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>全选</title>
<style>
.box{
width:100px;
height: 250px;
border:1px solid #000;
margin:50px auto;
padding: 5px 10px;
border-radius:5px;
}
.box div{
border-bottom:1px solid #000;
padding-bottom: 10px;
margin-bottom: 10px;
}
.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>
<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1<br>
<input type="checkbox" name="item[]">选项1<br>
<input type="checkbox" name="item[]">选项1<br>
<input type="checkbox" name="item[]">选项1<br>
<input type="checkbox" name="item[]">选项1<br>
<input type="checkbox" name="item[]">选项1<br>
</div>
</body>
</html>
获取元素：
checkall=document.getElementById("checkall")//获取全选
item=document.getElementsByName("item[]")// 获取下面的勾选框(注意单词
的拼写)
批改老师：灭绝师太批改时间：2018-11-23 09:13:02
老师总结：后面学到jq写法上会轻松很多，完成的不错，继续加油！
