我做了一个布局并设置了所有内容，当我在我的文本下实现计数器部分时，所有其他 HTML 元素都消失了，这是为什么？还有什么方法可以让我在计数器到达特定时间时发出电子邮件提醒？
<!doctype html>
<html lang="en">
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js"></script>
<meta charset="utf-8" />
<meta name="viewport" content="initial-scale=1.0, maximum-scale=1.0, user-
scalable=0, width=device-width;">
<title>Welcome to Tiffany & Co.</title>
<link rel="stylesheet" href="index.css"
type="text/css" media="screen" />
<script src="http://code.jquery.com/jquery-1.7.2.min.js"></script>
<!--Enable media queries in some unsupported subrowsers-->
<script type="text/javascript" src="css3-mediaqueries.js"></script>
<script type="text/javascript" src="main.js"></script>
</head>
<body>
<div id="wrapper">
<h1>Welcome to Store</h1>
<p>The WiFi Password is:</p>
<h2 align=center>
<font color="red">Diamonds</font>
</h2>
<p>It will change in:</p>
<p>
<script type="text/JavaScript">
window.document.onload = function () {
tick();
setInterval(tick, 1000);
};
function tick() {
var d = new Date();
var currentDate = new Date(d.getUTCFullYear(),
d.getUTCMonth(), d.getUTCDate(), d.getUTCHours(),
d.getUTCMinutes(), d.getUTCSeconds(),
d.getUTCMilliseconds());
var endDate = new Date(currentDate.getFullYear(),
currentDate.getMonth(), currentDate.getDate() + (30
/*
saturday */
- currentDate.getDay()), 16
/* 9 AM Mountain
Time = 4 PM GMT */
);
var secondsUntilSaturday = Math.floor((endDate.getTime() - currentDate.getTime()) / 1000);
var timeUntilSaturday = secondsToTime(secondsUntilSaturday);
document.body.innerHTML = (timeUntilSaturday.h + " hours, " + timeUntilSaturday.m + " minutes, " + timeUntilSaturday.s + "
seconds");
}
function secondsToTime(secs) {
var hours = Math.floor(secs / (60 * 60));
var divisor_for_minutes = secs % (60 * 60);
var minutes = Math.floor(divisor_for_minutes / 60);
var divisor_for_seconds = divisor_for_minutes % 60;
var seconds = Math.ceil(divisor_for_seconds);
var obj = {
"h": hours,
"m": minutes,
"s": seconds
};
return obj;
}
</script>
<div id="logo">
<img src="logo.png" width="108" height="14" alt="Tiffany & Co." />
</div>
</div>
</body>
</html>
最佳答案
您的 HTML 内容因以下行而消失:
document.body.innerHTML = (timeUntilSaturday.h + " hours, " + timeUntilSaturday.m + " minutes, " + timeUntilSaturday.s + " seconds");
document.body.innerHTML 会将内容写入 body 元素，替换那里的任何内容。您可以将 document.body.innerHTML 替换为 document.write。
要回答你的第二个问题，没有 JavaScript 不能自己发送电子邮件，但它可以通过 AJAX 调用你服务器上的脚本来发送电子邮件。
关于javascript - 实现 javascript 倒计时时，其他 html 元素消失，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/11745022/