js進階篇中8-6取消計時器clearTimeout()代碼如下<html>
<head>
<meta?http-equiv="Content-Type"?content="text/html;?charset=utf-8">
<title>計時器</title>
</head>
<script?type="text/javascript">
??var?num=0;
??var?i;
??function?startCount(){
????document.getElementById('count').value=num;
????num=num+1;
????i=setTimeout("startCount()",1000);
??}
??function?stopCount(){
????clearTimeout(i);
??}
</script>
</head>
<body>
??<form>
????<input?type="text"?id="count"?/>
????<input?type="button"?value="Start"?onclick="startCount()"?/>
????<input?type="button"?value="Stop"?onclick="stopCount()"??/>
??</form>
</body>
</html>點擊多少次Start按鈕，就要點擊多少次Stop按鈕才能停在計時器。我想問此時i值是怎么保存setTimeout()的id值，通過數組嗎？假設是數組的話，clearTimeout(i)方法是用shift()刪除數組i里的元素和splice()添加元素的？
關于clearTimeout()的疑問
陽光雨下
2016-01-27 11:33:55
