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<!DOCTYPE html>
<html>
<body>
​
<form action="https://www.w3schools.com/action_page.php">
  <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>
​
<!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_checkbox_value3 by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 03:17:15 GMT -->
</html>
​
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