摘要：<!DOCTYPE html><html> <head> <meta charset="utf-8"> <title></title> <style> .dex{ width: 120px; height: 250px; border: 1px solid #0
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style>
.dex{
width: 120px;
height: 250px;
border: 1px solid #000;
border-radius: 4px;
margin: 20px auto;
padding: 5px 10px;
}
.dex div{
border-bottom: 1px solid #000;
}
.dex input{
margin: 8px;
}
</style>
</head>
<body>
<div class="dex">
<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>
<script>
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>
<!--谢谢老师指导，老师辛苦了 感谢php中文网-->
</html>
批改老师：灭绝师太批改时间：2018-11-06 09:08:41
老师总结：初学者来说，希望可以把js中每一句代码的的用意注释在旁边，便于记忆有利于学习
