JS - Wait for an image to load by periodically checking it's status. Useful when images are cached, and some browsers don't trigger appropriate events.

image_loaded.js

var $img = ...,
    imagesLoadedCallback = function() {
      // Do stuff
    }

(function waitForImageLoaded() {
    if ($img[0].complete && $img[0].naturalWidth > 0) {
        imagesLoadedCallback();
    }
    else {
        setTimeout(waitForImageLoaded, 300);
    }
})();