a button click should filter on a column but is fails

hello

I am a beginner in datatables, which I like, I think it's a great product.
but I can't filter the small datatable I created; you can find it here: http://jsfiddle.net/qwqFJ/ .but please be indulgent : in the js fiddle I created, I made some changes from my original code:
- the original code reads a JSON file and creates an array of arrays
- I was not able to render the table like it was on my computer

my question is : how can I filter the rows on one column, by clicking on a button?

regards,

olivier