<!DOCTYPE html>
<html>
<body>
<form id="myForm" action="form_action.asp">
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 return the value of each element in the form.</p>
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
<script>
function myFunction() {
var x = document.getElementById("myForm");
var txt = "";
var i = 0;
for (i = 0; i< x.length; i++) {
txt = txt + x.elements[i].value + "<br>";
}
document.getElementById("demo").innerHTML = txt;
}
</script>
</body>
</html>