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<!DOCTYPE html> <html> <body> <h1>Document 对象</h1> <h2>forms 属性</h2> <form action="/demo/action_page.php"> <p>名字：<input type="text" name="fname" value="Gates"></p> <p>姓氏：<input type="text" name="lname" value="Bill"></p> <p>城市：<input type="text" name="city" value="Seattle"></p> <input type="submit" value="提交"> </form> <p>表单中每个元素的值是：</p> <p id="demo"></p> <script> const form = document.forms[0]; let text = ""; for (let i = 0; i < form.length; i++) { text += form.elements[i].value + "<br>"; } document.getElementById("demo").innerHTML = text; </script> </body> </html>