If the CSS position value of a container element is 'relative',
then any absolutely positioned elements
contained by a relatively positioned element will be placed
in relation to that container element.
the contained element will appear 0px to the left and top pixels
from the container element.
The ceil property has the following syntax:
Math.ceil(number)
This will round up any floating-point number to the nearest integer.
There is a corresponding floor property(!?) that will round any floating-point
number down to the nearest integer
Math.floor(number)
The round property will round any floating-point number to whichever
whole number is closest.
Math.round(number)