What is the custom function(p,a,c,k,e,d) used for?

Question

I have seen a lot of websites with some function (p,a,c,k,e,d) in their JavaScript code. The different websites may have different bodies of this function, but

Answer 1

As I have seen that eval(function(p,a,c,k,e,d){}) is used in http://www.indiabix.com which uses it for hiding whole contents when user get download the page and open it . Maybe that is the inner workings of the particular code.