how to solve CORS when calling other domain

how to solve CORS when calling other domain

I am trying to call other domain(such as my web service running on 8080 and jquery program(index.html) running on 8084),that getting the cross domain problem so i found solution from our forum to implement

$.support.CORS = true;
crossDomain:'true',
even my webservice not calling,in my firebug am getting the following 
 OPTIONS http://10.163.14.56:9000/customerservice/HashValue [HTTP/1.1 200 OK 17ms]

but i have set request type is 'POST',when i am using header,it is changed as 'OPTIONS'
So please any one having code CORS implementation in JQuery, share it with me,
it would help for me

Thanks in advance
Regards
G.Lenin