saving co-ordinates of the markers on a plot without wxpython


i am newbie to both python n matplotlib.
Would like to know if there is a way to save
the co-ordinates of the points ploted in a graph.
So that i could use them for some mouse
over function using javascripts.

the graphs are generated on windows based
browsers so can not use wxpython.

any idea how this could be done.

using python 2.4 and matplotlib 0.86