Javascript中倒计时问题
<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<h2>操作成功</h2>
<p><strong id = "count">5</strong>秒后返回</p>
<script type="text/javascript">
var num=5;
function startCount() {
document.getElementById("count").value=num;
num=num-1;
setTimeout("startCount()",1000);
}
</script>
</body>
</html>
为什么不会进行倒计时呢？？？
开拓者OS浏览 1573回答 2
2回答
-
紫焰123
因为 startCount 这个函数并没有被调用啊。<script type="text/javascript"> var num=5; function startCount() { if (num >= 0){ document.getElementById("count").innerHTML = num; setTimeout("startCount()",1000); num = num-1; } } startCount(); </script> -
开拓者OS
document.getElementById("count").innerHTML = num; document.getElementById("count").value = num;为什么不可以呢？？求指教.........
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相关分类
JavaScript