get element background colour in jquery

Hi - could anyone tell me how to get the css set background colour of
an element in jquery. I have a series of divs which have ids that set
the bgcolour. when a div is clicked i want to get the particular
background colour for that id. i can do the click event stuff and get
the id of the clicked div - but i dont knwo how to get the bgcolour.
thanks for any help given