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<!DOCTYPE html> <html> <body> <h2>JavaScript addEventListener()</h2> <p>此示例使用 addEventListener() 方法将两个单击事件添加到同一个按钮。</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 ("这个函数也执行了！"); } </script> </body> </html>