CAPSLOCK check

<input type="text" id="caps" onkeypress="capsLock(this);"/>

<script>
function capsLock(e){
	var keyCode = e.which?e.which:event.keyCode;
	var shiftKey=false;
	shiftKey=e.shiftKey;
	console.log(keyCode);
	if (((keyCode >= 65 && keyCode <= 90)&& !shiftKey)||((keyCode >= 97 && keyCode <= 122)&& shiftKey)){
		alert("CapsLock이 켜져 있습니다");
		return;
	}
}
</script>