我已经尝试了一切，我不能这样做！这是我的代码请帮助：
<!DOCTYPE html>
<html>
<head>
<link rel="shortcut icon" href="favicon.ico"/>
<title>Doughtnut Box !</title>
<!--Design-->
<style>
</style>
<!--jQuery and Javascript-->
<script>
var doughnut = 0;
window.setInterval(
doughnut + 1
,1000);
document.getElementById("doughnuts").innerHTML="You have " + doughnut >+ " doughnuts!";
</script>
</head>
<body>
<h3 id="doughnuts"></h3>
</body></html>
感谢您的代码，它真的很棒！现在我如何保存它以便在刷新时不会重新开始？
把它们放在一个函数中。另外，将表达式更改为赋值。
<script>
var doughnut = 0;
window.setInterval(
function () {
doughnut = doughnut + 1;
document.getElementById("doughnuts").innerHTML = "You have " + doughnut + " doughnuts!";
}, 1000);
</script>
下面的Runnable演示：
var doughnut = 0;
window.setInterval(function () {
doughnut = doughnut + 1;
document.getElementById("doughnuts").innerHTML = "You have " + doughnut + " doughnuts!";
}, 1000);<div id="doughnuts"></div>setInterval接受函数或引用代码。试试看：
<script>
var doughnut = 0;
window.setInterval(function(){
doughnut++;
document.getElementById("doughnuts").innerHTML = "You have " + doughnut + " doughnuts!";
}, 1000);
</script>
试试这个：
var doughnut = 0;
//show 0 for the first time
show_value();
//start counter
setInterval(function(){
doughnut += 1;
show_value();
}, 1000);
function show_value(){
document.getElementById("doughnuts").innerHTML = "You have " + doughnut + " doughnuts!";
}
试试这个：
var doughnut = 0;
window.setInterval(
function()
{
document.getElementById("doughnuts").innerHTML="You have " + ++doughnut + " doughnuts!";
}
,1000);
另一种计算时间来完成功能的方法。
这种情况不相关，但在某些情况下可能有用。
var doughnut = 0;
function show_value()
{
document.getElementById("doughnuts").innerHTML = "You have " + doughnut++ + " doughnuts!";
setTimeout(show_value, 1000);
}
show_value();