code: function processSize(targetSize, origSize) {
  		var match = (targetSize.match(r_percentage) || [])[1];
  
  		if (match /= 100) {
  			return {
  				width: origSize.width * match,
  				height: 0
  			};
  		} else {
  			return {
  				width: (targetSize.match(r_width) || [])[1] || 0,
  				height: (targetSize.match(r_height) || [])[1] || 0
  			};
  		}
  	}
docs: Height matching. 
  Process the size, return object of new size.
  Currently only test percentages.