<html>
<body>
<form>
First Name: <input type="text" name="fname" value="Donald"><br>
Last Name: <input type="text" name="lname" value="Duck">
</form>
<p>Click the button to display the number of form elements in the document.</p>
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
<script>
function myFunction() {
var x = document.forms.length;
document.getElementById("demo").innerHTML = x;
}
</script>
</body>
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</html>