Recursion issue with binding 2 textfields

javascript

imageWidthChange: function() {
	var newHeight = Math.ceil(this.get('_imageSizeRatio') * this._imageWidth);
	this.set('_imageHeight', newHeight);
}.observes('_imageWidth'),

imageHeightChange: function() {
	var newWidth = Math.ceil(this.get('_imageSizeRatio') / this._imageHeight);
	this.set('_imageWidth', newWidth);
}.observes('_imageHeight'),

Template

{{view SC.TextField valueBinding="_imageWidth" }}
{{view SC.TextField valueBinding="_imageHeight" }}