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<!DOCTYPE html> <html> <body> <h1>HTML DOM insertAdjacentElement() 方法</h1> <p>此方法将指定元素插入到指定位置。</p> <span style="color:red">我的span</span> <h2 id="myH2">我的标题</h2> <p>单击按钮以在标题内插入红色 span：</p> <button onclick="myFunction()">移动 span</button> <script> function myFunction() { var s = document.getElementsByTagName("span")[0]; var h = document.getElementById("myH2"); h.insertAdjacentElement("beforeend", s); } </script> </body> </html>