I need to be able to create *dynamic* polygons that have the following
3 abilities:

1) be able to click on the map to make the polygonal shape and when I
click on or *near* the first marker, it then forms the polygon and
properly *seals* it and lightly shades the inside with a transparent
color.

2) after the polygon is formed, can move markers to reshape the
polygon on the fly

3) after polygon is formed, can retrieve all the points (lat,lng) of
the polygon. I'm assuming this last step can be done by storing the
points in an array as I click to form the polygon. I'm wondering if
that's the best way to handle the problem on *reshaping* the polygon.

thanks in advance for your help.
Nick