Javascript DOM HTML Input Checkbox form Property get

Introduction

Get the id of the form containing the <input type="checkbox"> element: 

var x = document.getElementById("myCheck").form.id;

Click button to display the id of the form the checkbox belongs to.

View in separate window 

<!DOCTYPE html>
<html>
<body>

<form id="myForm">
Checkbox: <input type="checkbox" id="myCheck">
</form>/*from   w w  w  . j  a  v  a  2 s .c om*/
<button onclick="myFunction()">Test</button>

<p id="demo"></p>

<script>
function myFunction() {
  var x = document.getElementById("myCheck").form.id;
  document.getElementById("demo").innerHTML = x;
}
</script>

</body>
</html>

The form property returns a reference to the form containing the checkbox.

This property returns a form object on success.

If the checkbox is not in a form, null is returned

This property is read only.




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