<!DOCTYPE html> <html> <body> <h1>Document 对象</h1> <h2>forms 属性</h2> <p><form id="myCarForm"> 喜欢的车:<input type="text" name="fname" value="Volvo"> </form></p> <p><form id="myColorForm"> 喜欢的颜色:<input type="text" name="favcolor" value="Blue"> </form></p> <p>id="myForm" 的表单元素的 HTML 内容是:</p> <p id="demo"></p> <script> let html = document.forms.namedItem("myCarForm").innerHTML; document.getElementById("demo").innerHTML = html; </script> </body> </html>