Ajax: Permission denied to call method XMLHttpRequest.open

[eluser]TSOL[/eluser]
Hi,

I'm trying to implement an ad rotator logic that logs users' info by making an AJAX POST every time the ad displays to a function within a Controller. Within the Controller, it inserts an entry into a table. Simple, right?

I'm getting the "Error: uncaught exception: Permission denied to call method XMLHttpRequest.open" once in awhile.

I googled the error and it's due to cross domain calls. The Controller is within the same down right? Also, the error is not consistent (exception doesn't occur every time).

Any input / advice is appreciated.

Cheers.