How can I have java script client call service bus endpoint (relay feature)?

Hello -

   I would like to expose couple of WCF services using service bus endpoint (relay) to our customers. our customers are mostly java script clients. meaning - they will need to call service bus endpoint using java script clients.

  I have found many examples of calling service bus using C#. But, how do I call service bus end point using Java script such that I don't expose those  secrete keys to whole wild world?

-PPT