Ну, запрос не запрос, но можно вот так попробовать:
alert(decodeURI("%D0%9F%D0%BE%D1%81%D1%82%D0%B0%D0%B2%D1%8C%20%D1%81%D1%86%D1%83%D0%BA%D0%BE%20%D0%BB%D0%B0%D0%B9%D0%BA%20%D0%B8%D0%BB%D0%B8%20%D0%B7%D0%B0%D0%BC%D1%83%D1%87%D0%B8%D0%B5%D1%88%D1%81%D1%8F%20%D0%B2%D1%8B%D1%87%D1%8F%D1%89%D0%B0%D1%82%D1%8C%20%D1%81%D0%B2%D0%BE%D0%B9%20%D0%BA%D0%BE%D0%BF%D0%BC%20%D0%BE%D1%82%20%D0%B2%D0%B8%D1%80%D1%83%D1%81%D0%B0%D0%B2!!!!!!!"));