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<!DOCTYPE html> <html> <body> <h2>JavaScript addEventListener()</h2> <p>此示例使用 addEventListener() 方法在同一个按钮上添加多个事件。</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>