html运行实例（eg_js_addeventlistener_add_many

代码示例：（标识：eg_js_addeventlistener_add_many_2）

<!DOCTYPE html>
<html>
<body>

<h1>JavaScript addEventListener()</h1>

<p>此例使用 addEventListener() 方法在同一按钮上添加许多事件。</p>

<button id="myBtn">试一试</button>

<p id="demo"></p>

<script>
var x = document.getElementById("myBtn");
x.addEventListener("mouseover", myFunction);
x.addEventListener("click", mySecondFunction);
x.addEventListener("mouseout", myThirdFunction);

function myFunction() {
  document.getElementById("demo").innerHTML += "Moused over!<br>";
}

function mySecondFunction() {
  document.getElementById("demo").innerHTML += "Clicked!<br>";
}

function myThirdFunction() {
  document.getElementById("demo").innerHTML += "Moused out!<br>";
}
</script>

</body>
</html>