this._loadFromFile = function(file,store,callback){
        if (window.File && window.FileReader && window.FileList && window.Blob)
        {
            // Great success! All the File APIs are supported.
            var reader = new FileReader();
            reader.onload = function(evt)
            {
                var csvContent = evt.target.result;
                var tiles = csvContent.split("\r\n");
                var tileCount = 0;
                var pair, tile;

                if(tiles[0] !== "url,img")
                {
                    return callback(false, "File " + file.name + " doesn't contain tiles that can be loaded");
                }

                for(var i=1; i<tiles.length; i++)
                {
                    pair = tiles[i].split(",");
                    tile = {
                        url: pair[0],
                        img: pair[1]
                    };
                    console.log("read",tile.url);
                    store.store(tile,function(success)
                    {
                        console.log(".");

                        if( success )
                        {
                            tileCount += 1;
                        }

                        if( tileCount === tiles.length-1)
                        {
                            console.log("finished!");
                            window.setTimeout(function() { /* refresh layer by zooming in and out, or some way that really refreshes the layer */ }, 1000);
                            callback(true, tileCount + " tiles loaded from " + file.name);
                        }
                    });
                }
            };
            reader.readAsText(file);
        }
        else
        {
            callback(false, "The File APIs are not fully supported in this browser.");
        }
    };