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<!DOCTYPE html> <html> <body> <h3>如何访问 FOOTER 元素的演示</h3> <footer id="myFooter"> <p>页脚中的一些文本。</p> </footer> <p>单击该按钮可获取页脚元素的内容。</p> <button onclick="myFunction()">试一试</button> <p id="demo"></p> <script> function myFunction() { var x = document.getElementById("myFooter").innerHTML; document.getElementById("demo").innerHTML = x; } </script> </body> </html>