Copy a PHP/Javascript GoogleMaps API example and make it work

This is just for a proof of concept, no CSS is to be done, no integration with anything else; it's just to have this simple piece of code located at this URL to be put into a single new PHP page. It really doesn't have to be nice, it just needs to work: [login to view URL] You will also need to add a addListener function so that you can catch the polygoncomplete event. The function is here: [login to view URL] Details: - Only the polygon tool is to be used, the other overlaytypes can be discarted, this is just by removing 4 lines of code in the example - If possible I would like to have only one polygon allowed, if a second one is drawn by the user then the first one would need to disapear automagically. Not sure if this is possible, we can discuss it. - A submit button must be added just below the map, and that button must be used to post the polygon's latitudes and longitudes for each point, that were catched from the polygoncomplete event, to another page that will simply fetch the post parameters and show the lat and long values and die(), nothing else. - I will expect you to develop on your own web server and provide me with the code once working, and by removing your API key.