I can't have the return-value from my showAddress

Hi!
Javascript, Ajax and GMaps all all new things for me.
I call the function showAddress from a Win-Form with a WebBrowser
inside, to get the coordinates of an address. But I can't have the
return-value of the function (I don't know why). Can you (please) give
me a little code-example?

This is my function:

function showAddress(address) {
var map = new GMap2(document.getElementById("map_canvas"));
var geocoder = new GClientGeocoder();
var risultato = "iniziale";

geocoder.getLatLng(address,
function(point) {
if (!point) {
risultato = "not found";
} else {
map.setCenter(point, 13);
var marker = new GMarker(point);
map.addOverlay(marker);
marker.openInfoWindowHtml(address);
risultato = "evvai";
// return "#" + point.lat() + "#" + point.lng();
}
}
);
return risultato;
}

It returns always "iniziale" (the initial value)
Thank you!
Pileggi

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