function getRemainingHeight( element, height ) {

		height = height || 0;

		if( element ) {
			var newHeight, oldHeight = element.style.height;

			// Change the .stretch element height to 0 in order find the height of all
			// the other elements
			element.style.height = '0px';
			newHeight = height - element.parentNode.offsetHeight;

			// Restore the old height, just in case
			element.style.height = oldHeight + 'px';

			return newHeight;
		}

		return height;

	}
Returns the remaining height within the parent of the
target element.

remaining height = [ configured parent height ] - [ current parent height ]