Currently for the height and width functions, this is the description: >> Get the current computed, pixel, height of the first matched element.
As for setting the height or width, you can specify a unit: >> Set the CSS height of every matched element. >> If no explicit unit was specified (like 'em' or '%') then "px" is >> concatenated to the value. It would nice if we could retrieve the computed height/width of elements in ems instead of pixels, because I'm trying to avoid pixels in CSS except for borders.