turn server error in apprtc.debug.js

[chenwandong]

(apprtc.debug.js:1960) Failed to load turn:22.45.15.162:3478/turn?username=475795&key=itisgood: Cross origin requests are only supported for protocol schemes: http, data, chrome, chrome-extension, https.
I am using those settings, is there any problem in my configuration file ?

why apprtc.debug.js test turn server with xmlhttprequest ?

var constants = {
LOOPBACK_CLIENT_ID: 'LOOPBACK_CLIENT_ID',
TURN_BASE_URL: 'turn:22.45.15.162:3478',
TURN_URL_TEMPLATE: '%s/turn?username=%s&key=%s',
CEOD_KEY: 'itisgood',
WSS_HOST_ACTIVE_HOST_KEY: 'wss_host_active_host', //memcache key for the active collider host.
WSS_HOST_PORT_PAIRS: ['apprtc-ws.webrtc.org:443', 'apprtc-ws-2.webrtc.org:443'],
RESPONSE_ERROR: 'ERROR',
RESPONSE_UNKNOWN_ROOM: 'UNKNOWN_ROOM',
RESPONSE_UNKNOWN_CLIENT: 'UNKNOWN_CLIENT',
RESPONSE_ROOM_FULL: 'FULL',
RESPONSE_DUPLICATE_CLIENT: 'DUPLICATE_CLIENT',
RESPONSE_SUCCESS: 'SUCCESS',
RESPONSE_INVALID_REQUEST: 'INVALID_REQUEST'
};

Thanks in advance, i will appreciate any help.. i am tired of this issue now.