<!DOCTYPE html>
<html lang="en-US">
<body>
<p onmousedown="myFunction(event)">Hold 'CTRL' key and click on me</p>
<script>
function myFunction(e){
if(e.ctrlKey)
alert("ctrlKey was Pressed");
else
alert("ctrlKey was not Pressed");
}
</script> </body>
</html>