<form action="/action.php">
<label for="fname">First name:</label><br>
<input type="text" id="fname" value="Mike"><br><br>
<label for="lname">Last name:</label><br>
<input type="text" id="lname" value="Walker"><br><br>
<input type="submit" value="Submit">
</form>edit & run code by clicking it<form method="GET" action="example/message.html">
<p>Name: <input type="text" name="name"></p>
<p>Message:<br><textarea name="message"></textarea></p>
<p><button type="submit">Send</button></p>
</form>var formElement = document.getElementById("myFormElement");
var xhr = new XMLHttpRequest();
xhr.open("POST", "submitform.php");
xhr.send(new FormData(formElement));var formElement = document.getElementById("myFormElement");
formData = new FormData(formElement);
formData.append("serialnumber", serialNumber++);
xhr.send(formData);var formData = new FormData();
formData.append("username", "Groucho");
formData.append("accountnum", 123456);
formData.append("afile", fileInputElement.files[0]);
var xhr = new XMLHttpRequest();
xhr.open("POST", "http://foo.com/submitform.php");
xhr.send(formData);