Tryit Editor v2.9

Edit This Code:
<!DOCTYPE html>
<html>
<body>

<form id="myForm">
  <label id="myLabel" for="male">Male</label>
  <input type="radio" name="sex" id="male" value="male"><br>
</form>

<p>Click the "Try it" button to return the id of the form the label belongs to.</p>

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

<button onclick="myFunction()">Try it</button>

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

</body>
</html>