<!DOCTYPE html>
<html>
<body>
<form action="form_action.asp">
<input type="checkbox" id="myCheck" name="vehicle" value="Bike" checked> I have a bike<br>
<input type="submit" value="Submit">
</form>
<p>Submit the form to see the value of the name and value attribute of the checkbox, as received input (the checkbox must be checked, or nothing is returned).</p>
<p>Click the "Try it" button to change the value from "Bike" to "newCheckboxValue".</p>
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
<script>
function myFunction() {
document.getElementById("myCheck").value = "newCheckboxValue";
document.getElementById("demo").innerHTML = "The value of the value attribute was changed. Try to submit the form again.";
}
</script>
</body>
</html>