<!DOCTYPE?html>
<html>
<head>
????<meta?charset="UTF-8">
????<title>Document</title>
????<style>
????#div1?#active?{
????????background:?yellow;
????}
????
????#div?div?{
????????width:?200px;
????????height:?200px;
????????border:?1px?solid?blue;
????}
????</style>
????<script>
????var?oDiv?=?document.getElementById("div1");
????var?oBtn?=?oDiv.getElementsByTagName("input");
????var?xDiv?=?oDiv.getElementsByTagName("div");
????for(i=0;i<oBtn.length;i++){
?????oBtn[i].click=function(){
?????
????---------------------------------------
?????for(i=0;i<oBtn.length;i++){
?????oBtn[i].className="";
?????xDiv[i].style.display="none";
?????}
?????--------------------------------------
?????}
????}
????</script>
</head>
<body>
????<div?id="div1">
????????<input?type="button"?value="1">
????????<input?type="button"?value="2">
????????<input?type="button"?value="3">
????????<input?type="button"?value="4">
????????<div>11</div>
????????<div>22</div>
????????<div>33</div>
????????<div>44</div>
????</div>
</body>
</html>上面代碼中，兩條白線中間的for循環中，for（i=0;i<oBtn.length;i++）{為什么oDiv也可以放在for當中呀，for循環里面條件不是 i<oBtn.length ?按鈕的長度么？ ??}
關于for循環語句的問題
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2017-04-13 00:01:10
