Javascript Closure Keeps Returning a Function But Should Be a String

Javascript Closure Keeps Returning a Function But Should Be a String

I have written the following closure that should return a string but it
returns a function object. What am I doing wrong here?
BDS.CDNS = (function() {
var DEVROOT;
var TESTROOT = '/';
var PRODROOT = '/';
var _IsSecure;
return {
CDN1: function CDN1() {
if (BDS.ENV === BDS.ENV_OPTIONS.DEV) {
return (_IsSecure ? BDS.SECUREPROTOCOL : BDS.UNSECUREPROTOCOL)
+ DEVROOT;
}
else if (BDS.ENV === BDS.ENV_OPTIONS.TEST) {
return (_IsSecure ? BDS.SECUREPROTOCOL : BDS.UNSECUREPROTOCOL)
+ TESTROOT;
}
else if (BDS.ENV === BDS.ENV_OPTIONS.PROD) {
return (_IsSecure ? BDS.SECUREPROTOCOL : BDS.UNSECUREPROTOCOL)
+ PRODROOT;
}
return '';
}
}());
When calling BDS.CDNS.CDN1 => function object. It should return a string.
Thanks.