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<!DOCTYPE html> <html> <body> <h1>Document 对象</h1> <h2>addEventListener() 方法</h2> <p>此例在文档中添加了多个事件。</p> <p id="demo"></p> <script> document.addEventListener("mouseover", myFunction); document.addEventListener("click", mySecondFunction); document.addEventListener("mouseout", myThirdFunction); function myFunction() { document.getElementById("demo").innerHTML = "鼠标悬停！" } function mySecondFunction() { document.getElementById("demo").innerHTML = "点击！<br>" } function myThirdFunction() { document.getElementById("demo").innerHTML = "鼠标移出！<br>" } </script> </body> </html>