Initialize service using admin guid in javascript

Hi All, I have a requirement that need to Initialize service using admin guid in java script. i need to get some entity data on client side where users don't have access to it only admin had access to it when users access some of the functionality in an entity. Could any one help me on this how can achieve this functionality. on server side i know initialize service using admin id as shown in below
IOrganizationService service = GetService(adminid).

But how can i achieve this on client side