function relativePosition(rect, targetRect, rel) {
		var x, y, w, h, targetW, targetH;

		x = targetRect.x;
		y = targetRect.y;
		w = rect.w;
		h = rect.h;
		targetW = targetRect.w;
		targetH = targetRect.h;

		rel = (rel || '').split('');

		if (rel[0] === 'b') {
			y += targetH;
		}

		if (rel[1] === 'r') {
			x += targetW;
		}

		if (rel[0] === 'c') {
			y += round(targetH / 2);
		}

		if (rel[1] === 'c') {
			x += round(targetW / 2);
		}

		if (rel[3] === 'b') {
			y -= h;
		}

		if (rel[4] === 'r') {
			x -= w;
		}

		if (rel[3] === 'c') {
			y -= round(h / 2);
		}

		if (rel[4] === 'c') {
			x -= round(w / 2);
		}

		return create(x, y, w, h);
	}
Returns the rect positioned based on the relative position name
to the target rect.

@method relativePosition
@param {Rect} rect Source rect to modify into a new rect.
@param {Rect} targetRect Rect to move relative to based on the rel option.
@param {String} rel Relative position. For example: tr-bl.