random images using json data file

[3dcases]

Having used this carousel for many years and it has served me extremely well using a json file.

I have another use for it but i need the images to be random from the json file.
If anyone can tell me how to implement this I am happy to pay for the information
PLEASE HELP

here is the code i use at the moment
$.getJSON("../include/show_data.php", function (data) {
$("#head_slideshow").agile_carousel({
carousel_data: data,
carousel_outer_height: 347,
carousel_height: 347,
slide_height: 347,
carousel_outer_width: 513,
slide_width: 513,
transition_type: "fade",
transition_time: 1500,
timer: 4000
});
});