<!DOCTYPE html>
<html>
<body>
<p>点击 Start 按钮每 2 秒输出一次“Hello”。</p>
<p>在此示例中，我们还输出传递给 alertFunc() 函数的参数。</p>
<button onclick="myStartFunction()">开始</button> <button onclick="myStopFunction()">停止</button>
<p id="demo"></p>
<p id="demo2" style="color:red;"></p>
<script>
var myVar;
function myStartFunction() { myVar = setInterval(function(){ alertFunc("First parameter", "Second parameter"); }, 2000);}
function alertFunc(param1, param2) { document.getElementById("demo").innerHTML += "Hello ";
document.getElementById("demo2").innerHTML = "传递给 alertFunc() 的参数：<br>" + param1 + "<br>" + param2 + "<br>";
}
function myStopFunction() { clearInterval(myVar);
}
</script>
</body>
</html>