var sh = getObjectHeight(this.stretchable);
var newSize = sh + delta;
this.stretchable.style.height = newSize + 'px';
var ratio = this.image.height / this.image.width;
var bestFitSize = this.getBestFitSize(ratio);
var sh = getObjectHeight(this.stretchable);
var newSize = sh + delta;
this.stretchable.style.height = newSize + 'px';
var ratio = this.image.height / this.image.width;
var bestFitSize = this.getBestFitSize(ratio);