FormAPI and Web Service

System

I call a Web service from within a javascript which is called from a DCT. I use the response to fill an optionlist. It all works fine, except that every time the web-service is called I resive a message saying:

"The page is accessing information that is not under its control. This poses a security risk. Do you want to continue" - Yes NO

I have called the web-service in a browser from both client and server. In both cases no warnings are given.

Does anyone know a solution on this?

I think that the JavaScript is running on the server is this correct?