Get image height before writing to the dom

image_size.js

img_call = function(url){
  $('<img />').attr('src', url).load(function(){console.log(this.width); console.log(this.height);});
};

// Image Dimension return version

img_attr = function(url){
  var img_attributes = {};
  $('<img />').attr('src', url).load(function(){
                                       img_attributes.width = this.width; 
                                       img_attributes.height = this.height;
                                       img_attributes.src = url;
                                     });
 return img_attributes;
};