<html>
<body>
<form action="https://www.w3schools.com/action_page.php" method="get">
First name: <input type="text" name="fname" value="Donald"><br>
Last name: <input type="text" name="lname" value="Duck"><br>
<input type="submit" id="mySubmit" formmethod="post" value="Submit">
</form>
<p>Click the "Display formmethod" button to display the value of the formmethod attribute of the submit button above.</p>
<p>When submitting the form, notice that the button's formmethod overrides the form's method (get).</p>
<button onclick="myFunction()">Display formmethod</button>
<p id="demo"></p>
<script>
function myFunction() {
var x = document.getElementById("mySubmit").formMethod;
document.getElementById("demo").innerHTML = x;
}
</script>
</body>
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</html>