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JS實(shí)現(xiàn)全選

original 2019-03-13 10:29:22 234
abstrait:<!doctype html><html><head><meta charset="utf-8"><title>JS-demo</title><style>.box{width:120px; height:250px;border:1px solid #ccc; border-radius:5p

<!doctype html>

<html>

<head>

<meta charset="utf-8">

<title>JS-demo</title>

<style>

.box{width:120px; height:250px;border:1px solid #ccc; border-radius:5px; padding:5px 10px; margin:20px auto;}

.box div{border-bottom:1px solid #ccc; padding-bottom:10px;}

.box input{margin:8px;}

</style>

</head>

<body>

<div class="box">

<div><input type="checkbox" id="checkall" onClick="checkAll()"><label for="checkall">全選</label></div>

<input type="checkbox" name="item[]">選項(xiàng)一<br>

<input type="checkbox" name="item[]">選項(xiàng)二<br>

<input type="checkbox" name="item[]">選項(xiàng)三<br>

<input type="checkbox" name="item[]">選項(xiàng)四<br>

<input type="checkbox" name="item[]">選項(xiàng)五<br>

<input type="checkbox" name="item[]">選項(xiàng)六<br>

</div>

</body>

<script type="application/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>

</html>

//練習(xí)時(shí),變量名checkall,書寫錯(cuò)誤,導(dǎo)致無法實(shí)現(xiàn)功能,看了好半天才發(fā)現(xiàn)。。。。。拼寫不規(guī)范,查找兩行淚

Professeur correcteur:韋小寶Temps de correction:2019-03-14 09:08:35
Résumé du professeur:實(shí)現(xiàn)了全選還要可以獲取到全選的信息才能呢 這個(gè)在以后的開發(fā)都會使用到的

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