Return the id of the form containing the <input type="hidden"> element:
var x = document.getElementById("myInput").form.id;
Click the button to display the id of the form the hidden input element belongs to.
<!DOCTYPE html> <html> <body> <form id="myForm"> <input type="hidden" id="myInput"> </form>//w ww . ja va 2 s . c o m <button onclick="myFunction()">Test</button> <p id="demo"></p> <script> function myFunction() { var x = document.getElementById("myInput").form.id; document.getElementById("demo").innerHTML = x; } </script> </body> </html>
The form
property returns a reference to the form containing the hidden input field.
This property returns a form object on success.
This property is read only.
If the hidden input field is not in a form, null is returned