code: function pushImageSizeAndExpress_flickrJson(imageSize, photo_id){
    if(!enabledCache)return null;
    var d           = new Date();
    var expiresTime = d.getTime() + cachePeriod;
    
    for(var i=0; i < cacheJson.length; i++){
      if(cacheJson[i].fl.photo.id == photo_id){
        cacheJson[i].fl.photo.imgSize = imageSize;
        cacheJson[i].expires = expiresTime;
      }
    }
  }
docs: push flickr photos