<!DOCTYPE html>
<html>
<body>
<form id="myForm" action="demo_post_enctype.asp" method="post">
First name: <input type="text" name="fname" value="Donald"><br>
Last name: <input type="text" name="lname" value="Duck"><br>
<input type="submit" value="Submit">
</form>
<p>Click the "Try it" button to change the value of the enctype attribute, for how the form data should be encoded.</p>
<p><b>Note:</b> Click "Submit" before and after you have clicked the on "Try it"
button.</p>
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
<script>
function myFunction() {
document.getElementById("myForm").enctype = "multipart/form-data";
document.getElementById("demo").innerHTML = "Form data will now be encoded as multipart/form-data.";
}
</script>
</body>
</html>