html运行实例（eg_js_addeventlistener_add_many

代码示例：（标识：eg_js_addeventlistener_add_many_1）

<!DOCTYPE html>
<html>
<body>

<h1>JavaScript addEventListener()</h1>

<p>此示例使用 addEventListener() 方法将两个 click 事件添加到同一按钮。</p>

<button id="myBtn">试一试</button>

<script>
var x = document.getElementById("myBtn");
x.addEventListener("click", myFunction);
x.addEventListener("click", someOtherFunction);

function myFunction() {
  alert ("Hello World!");
}

function someOtherFunction() {
  alert ("此函数也被执行了！");
}
</script>

</body>
</html>