[ServiceContract]
public interface IService
{

    [OperationContract]
    [WebInvoke(Method = "POST")]
    void Delete(int id);

}
 public class Service : IService
{
public void Delete(int id)
    {
       //I do Some Work
    }
}

$(function () {
    function successDel(data) {
        alert('done');

    }
    callService("MyserviceAddress/Delete", "POST", JSON.stringify({"id":"11"}), successDel, function errordel(xhr, status, error) {
        alert(error);
    }, "application/json; charset=utf-8", "json");

})
  function callService(url, type, data, successFunc, errorFunc, contentType, dataType) {
    $.ajax({
                   url: url,
                   type: type,
                   cache: false,
                   proccessData: false,
                   contentType: contentType,
                   dataType:dataType,
                   data: data,
                   success: successFunc,
                   error: errorFunc
               })
}