index.js
function getImageSize( flickrJson, photo_id, photo_size ){
  var sizeInfo = {"width":0, "height":0};
  
  var sizeTable = {
      "s": "Square",
      "q": "Large Square",
      "t": "Thumbnail",
      "m": "Small",
      "n": "Small 320",
      "-" : "Medium",
      "z": "Medium 640",
      "c": "Medium 800",
      "b": "Large",
      "o": "Original"
  }
  
  if(flickrJson && flickrJson.sizes.size){
    for(var i=0; i<flickrJson.sizes.size.length; i++){
      if(flickrJson.sizes.size[i].label == sizeTable[photo_size]){
        sizeInfo.width  = flickrJson.sizes.size[i].width;
        sizeInfo.height = flickrJson.sizes.size[i].height;
      }
    }
  }
  
  return sizeInfo;
}
function getImageSize( flickrJson, photo_id, photo_size ){
  var sizeInfo = {"width":0, "height":0};
  
  var sizeTable = {
      "s": "Square",
      "q": "Large Square",
      "t": "Thumbnail",
      "m": "Small",
      "n": "Small 320",
      "-" : "Medium",
      "z": "Medium 640",
      "c": "Medium 800",
      "b": "Large",
      "o": "Original"
  }
  
  if(flickrJson && flickrJson.sizes.size){
    for(var i=0; i<flickrJson.sizes.size.length; i++){
      if(flickrJson.sizes.size[i].label == sizeTable[photo_size]){
        sizeInfo.width  = flickrJson.sizes.size[i].width;
        sizeInfo.height = flickrJson.sizes.size[i].height;
      }
    }
  }
  
  return sizeInfo;
}
get image size