标题几乎说明了一切：我需要帮助制作一个仅在页面加载后 5 秒出现的按钮。
这是我正在使用的代码：
<html>
<body onload="setTimeout(showStuff, 5000)">
<br><br><br><br><br><br><br><br><br><br><br><br><br>
<div class=login align=center>
<font size=13 face=helvetica> You're doing that too much. </font><br> <br> <br>
<font size=5 face=helvetica>
You have entered the wrong username/password too many times <br>
<br><br>
<br><br>
Click "OK" to go back to the log-in page <br> <br>
<p id="Button"><input type=submit onclick="myFunction()" id="Button" value="OK"> </p>
<script>
document.getElementById("Button").style.visibility = "hidden";
function showStuff(Button){
document.getElementById("Button").style.display = "inline";}
function myFunction() {
window.location = "project.html"}
</script>
</div> </font>
</body>
</html>