call external webservice from javascript

geocode.Address A = new geocode.Address();
A.Country = "United States";
A.PostalCode = "12345";

geocode.Service s = new geocode.Service();
geocode.Address m = s.GetGeoAddress("eeeeeeee", A);

in C# code, i have added web reference and called "GetGeoAddress" web service, which takes static number and intense of Address class as parameters to it. 

I want to do the same on Javascript in crm 2015. Please help