HELP!! VERY VERY HELP!!

[volverinn at libero.it]

Hi all.

I've a serius problem. How can i do a query, oinly information, on the map when the user cliccked on his image?
I would research some information and display it with some attribute captured on their database.
I've georefererencing  a map with grass in x,y coordinate at the range W-1829 E100 and N100 S-6124.
How to convert x,y cliccked in an image bitmap on sites for perform the query?