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<!DOCTYPE html>
<html>
<body>
​
Checkbox: <input type="checkbox" id="myCheck">
​
<button onclick="check()">Check Checkbox</button>
<button onclick="uncheck()">Uncheck Checkbox</button>
​
<script>
function check() {
  document.getElementById("myCheck").checked = true;
}
​
function uncheck() {
  document.getElementById("myCheck").checked = false;
}
</script>
​
</body>
​
<!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_checkbox_checked2 by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 03:17:15 GMT -->
</html>
​
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