var j = "<div class =\"defdf\" id=\"none\">test</div><div>2</div><div>3</div><div id=\"none\">привет</div><div>3</div>"; alert(j.replace(/<div[^<>]+id="none"[ >="'а-яА-ЯёЁa-zA-Z0-9]+<\/div>/gi, ""));
