Someone

function foxytunesShortcutSense(event) {
	event.preventDefault();
	event.stopPropagation();

	var modifiers = new Array();
	if (event.altKey) 	modifiers.push("alt");
	if (event.ctrlKey) 	modifiers.push("control");
	if (event.metaKey) 	modifiers.push("meta");
	if (event.shiftKey) 	modifiers.push("shift");
	modifiers = modifiers.join(",");

	var key = ''; 
	var keycode = '';
	if (event.charCode) {
		key = String.fromCharCode(event.charCode).toUpperCase();
	} else {
		keycode = gFoxyTunesKeyUINames.GetVKName(event.keyCode);
	}

	var label = gFoxyTunesKeyUINames.GetPrettyLabel(modifiers, key, keycode);	
	event.target.value = label;
	event.target.setSelectionRange(0, 0);
	event.target.keydata = [modifiers, key, keycode];
}