Parameters are those which passed in client script:
google.maps.event.addListener(map, 'click',
function(e) {
ajaxRequest(MainForm.UniHTMLFrame1,
'mapClick',
['lat='+e.latLng.lat(), 'lng='+e.latLng.lng()]);
}
);
No address info is passed as parameter. You must explore maps API and if there is a function to retrieve address you can add it to parameter list and handle it on server side.