Javascript Reference - HTML DOM Input Radio form Property

The read only form property returns the form that contains the radio button.

Browser Support


`form`	Yes	Yes	Yes	Yes	Yes

Syntax

var v = radioObject.form

Return Value

A reference to the form element containing the radio button. If the checkbox is not in a form, null is returned.

Example

The following code shows how to get the id of the form containing the <input type="radio"> element.


<!DOCTYPE html>
<html>
<body>
<!--from w  w  w.jav  a 2 s .c o m-->
<form id="myForm">
Radio Button:<input type="radio" id="myRadio">
</form>
<button onclick="myFunction()">test</button>
<p id="demo"></p>
<script>
function myFunction() {
    var x = document.getElementById("myRadio").form.id;
    document.getElementById("demo").innerHTML = x;
}
</script>

</body>
</html>

The code above is rendered as follows: