[subzey]

document.addEventListener("keypress", function(e){
	if (!e.ctrlKey || e.keyCode > 40 || e.keyCode < 37) return;
	switch (e.keyCode){
		case 37:
			window.status = "Ctrl ←";
		break;
		case 38:
			window.status = "Ctrl ↑";
		break;
		case 39:
			window.status = "Ctrl →";
		break;
		case 40:
			window.status = "Ctrl ↓";
		break;
	}
	e.preventDefault();
}, false);

Works fine for me.