sample for random image replacement on page

gistfile1.txt

// Really basic shuffle function for array, via http://stackoverflow.com/a/6274381
function shuffle(o){for(var j, x, i = o.length; i; j = Math.floor(Math.random() * i), x = o[--i], o[i] = o[j], o[j] = x); return o;};


// Your replacement images
var replaceImages = array('image1.jpg', 'image2.jpg'); // add more here
var replaceIndex = 0; // stores which image in your array you are on

// Randomize the array so it is not always the same each time
replaceImages = shuffle(replaceImages);

// Find all images on the site
jQuery('img').each(function() {

   // this returns the remainder of a division, e.g. (12 % 5) == 2
   var i = (replaceIndex % replaceImages.length);

   // Replace image with yours
   jQuery(this).attr('src', replaceImages[i]);

   replaceIndex++; // up the index count
});