<html>
<body>
<p>Hover over the checkbox to simulate a mouse-click.</p>
<form>
<input type="checkbox" id="myCheck" onmouseover="myFunction()" onclick="alert('click event occured')">
</form>
<script>
function myFunction() {
document.getElementById("myCheck").click();
}
</script>
</body>
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</html>