code: function oldWebkitDirection(direction) {
  		direction = textualDirection(direction);
  		
  		if(reDeg.test(direction))
  			throw "The direction is an angle that can’t be converted.";
  		
  		var v = function(pos) {
  			return ~direction.indexOf(pos) ? '100%' : '0';
  		};
  		
  		return v('right') + ' ' + v('bottom') + ', ' + v('left') + ' ' + v('top');
  	}
docs: Creates direction definition for old Webkit gradients
  @param {String} direction
  @returns {String}