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<!DOCTYPE html> <html> <body> <h3>如何访问 FORM 元素的演示</h3> <form id="myForm" action="/action_page.php"> First name: <input type="text" name="fname" value="Donald"><br> Last name: <input type="text" name="lname" value="Duck"><br> <input type="submit" value="提交"> </form> <p>单击“试一试”按钮以获取在提交上述表单时将表单数据发送到何处的 URL。</p> <button onclick="myFunction()">试一试</button> <p id="demo"></p> <script> function myFunction() { var x = document.getElementById("myForm").action; document.getElementById("demo").innerHTML = x; } </script> </body> </html>