var btn = document.getElementById("btn") 
documentgetElementById("input_message").value;
    if (input_message == "かめ") {
	location.href='https://www.koeki-prj.org/roy/~c118236/reroad-test/room2/quiz.html';
    } else if (input_message == "") {
	alert("何も入力されていません！");
	return false;
    } else {
	location.href='https://www.koeki-prj.org/roy/~c118236/reroad-test/room2/hazure.html';
    }
}