set the touch display do the trick
Example
form method="get" action="https://graph.facebook.com/oauth/authorize" id="openid_form"> <input type="hidden" value="" name="client_id" id="client_id"/> <input type="hidden" value="touch" name="display" id="display"/> <input type="hidden" value="http://www.mobileborg.com/modules/openid/fb_callbackuri.php" name="redirect_uri" id="redirect_uri"/> <input type="hidden" value="email,read_stream,user_location,user_hometown,read_friendlists,user_photos,user_videos,publish_stream,offline_access" name="scope" id="scope"/> <div style="display:block"> <input type="hidden" name="oid_name" id="oid_name"/> <input type="hidden" size="40" class="openid-identifier" name="openid_identifier" id="openid_identifier"/> <input type="submit" style="display:none" value="Login" id="submit-button"/> </div> </form
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