using System.Collections.Generic;

using System.Linq;

using System;

public class Program

{

    public static void Main()

    {

        var URL = "http://.........../abc.aspx?JID=00001833";

        var JID = URL.Split('?').Last();

        Console.WriteLine(JID);     

        var JIDVal = JID.Split('=').Last();

        Console.WriteLine(JIDVal);

    }

}