编辑代码:
查看结果 »
试一试 - ©
w3ii.com
<!DOCTYPE html> <html> <body> <form id="myCarForm"> Favorite Car: <input type="text" name="fname" value="Volvo"> </form> <form id="myColorForm"> Favorite Color: <input type="text" name="favcolor" value="Blue"> </form> <p>Click the button to display the name of each form element in the document.</p> <button type="button" onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { var x = document.forms; var txt = ""; var i; for (i = 0; i < x.length; i++) { txt = txt + x[i].id + "<br>"; } document.getElementById("demo").innerHTML = txt; } </script> </body> </html>