[asp] sending selected variables to an .asp page

not quite sure if this is the right forum to place this question, but here goes:

scenario:
I have a citymap in flash divided into 25 zones…when you click on a region of the map it highlights that region…you can highlight more than 1 region at a time. when you click the send button, it should send variables representing the selected zones to an .asp page that calls up information for the selected zones.

problem:
at the start of the .fla I have 25 zone variables all set to a value of 0(off). if a user clicks on a zone or multiple zones the value then becomes 1(on). so i need to be able to send ONLY the selected zones to the .asp page…

How do I get the selected variables into the send function?

heres my send code(unfinished):


mybutton_mc.on(release) {
getURL(default.asp,[url variables here], "_blank", "post");
}

any help is greatly appreciated!