Hi, I'm too lazy to look into it right now, but (Update:finally, i wasn't) it does not work.

Use this test input:

Pick a card from below. 
(I choose 10 of s col 4 / row 1 below)

[1]     2d      Ah      5h      10s
[2]     Qc      3h      As      7c
[3]     Kc      6d      9s      Js
[4]     8h      Qd      3d      10c


Which column is your card in (1-4, left-to-right)?  4


        [1]     [2]     [3]     [4]

[1]     2d      Qc      Kc      8h
[2]     Ah      3h      6d      Qd
[3]     5h      As      9s      3d
[4]     10s     7c      Js      10c

Which row is your card in (1-4, top-to-bottom)? 4


Your card is: 10c
[download]

Oops! This can't work because you'll always get rows == cols. It will only work on cards that are on 1/1, 2/2, 3/3, and 4/4, as they don't move... But it's just a small glitch...

So long,
Flexx