abstract：<!DOCTYPE html><html><head><meta charset="UTF-8"><title>js復(fù)選框全選</title><style type="text/css"> *{margin: 0;padding:0;}.
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>js復(fù)選框全選</title>
<style type="text/css">
*{margin: 0;padding:0;}
.box1{width: 150px;height: 200px;border: 1px solid #333; border-radius: 5px;padding: 5px 10px;box-sizing: border-box;-webkit-box-sizing: border-box;-moz-box-sizing: border-box;margin: 150px;
}
.box2{border-bottom: 1px solid #333;padding-bottom: 5px;}
.box1 input{margin:6px 15px;}
</style>
<script type="text/javascript">
function checkall() {
var checkall,item;
checkall=document.getElementById('checkall')//獲取全選
item=document.getElementsByName("item[]")//獲取下面的勾選框
for (var i=0; i<item.length;i++) {
if(checkall.checked){
item[i].checked=true;//當(dāng)全選框被選中時(shí)，勾選框選中
}else{
item[i].checked=false；//否則，勾選框不被選中
}
}
}
</script>
</head>
<body>
<div>
<div>
<input type="checkbox" id="checkall" onclick="checkall()"><label for="checkall">全選</label>
</div>
<input type="checkbox" name="item[]">選項(xiàng)1<br>
<input type="checkbox" name="item[]">選項(xiàng)2<br>
<input type="checkbox" name="item[]">選項(xiàng)3<br>
<input type="checkbox" name="item[]">選項(xiàng)4<br>
<input type="checkbox" name="item[]">選項(xiàng)5<br>
<input type="checkbox" name="item[]">選項(xiàng)6<br>
</div>
</body>
</html>
js語句用于判斷全選框是否被勾選，如果是，下方的勾選框全部勾選，反之不被勾選
Correcting teacher：滅絕師太Correction time：2019-01-04 09:12:00
Teacher's summary：作業(yè)完成的很好，全選案例在后面比較常用奧，要好好掌握！