how to redirect https --> http without popup security window? usually if you redirect user's https request to http, then the browser will display a popup security warning window saying that you are about to redirect to non-secure site... but look at yahoo mail login. if you signout yahoo mail completely, then go to www.yahoo.com , then click "Email", in it's login page, click "secure" in Mode, now you are in its Secure url https://login.yahoo.com, its form post action is also a https:// url. Ho