function when_images_loaded($img_container, callback) { /* do callback when images in $img_container (jQuery object) are loaded. Only works when ALL images in $img_container are newly inserted images and this function is called immediately after images are inserted into the target. */     var _imgs = $img_container.find('img'),         img_length = _imgs.length,         img_load_cntr = 0;     if (img_length) {//if the $img_container contains new images.         _imgs.on('load', function() {//then we avoid the callback until images are loaded             img_load_cntr++;             if (img_load_cntr == img_length) {                 callback();             }         });     }     else { //otherwise just do the main callback action if there's no images in $img_container.         callback();     } }