<html>
<body>
<p>Display some text when the checkbox is checked:</p>
<label for="myCheck">Checkbox:</label>
<input type="checkbox" id="myCheck" onclick="myFunction()">
<p id="text" style="display:none">Checkbox is CHECKED!</p>
<script>
function myFunction() {
var checkBox = document.getElementById("myCheck");
var text = document.getElementById("text");
if (checkBox.checked == true){
text.style.display = "block";
} else {
text.style.display = "none";
}
}
</script>
</body>
</html>