detect marker and move if exists

[Kile Design]

Hi all.
Is there a easy way to detect if a map has a marker or not? I need to allow only one marker and just update it's position if the address is changed (from a call from a form text field).

Got most part up'n'running, but now it just adds more markers when I change the address... need to prevent that...
Hope someone has a good practice on this... thanks...

[Esa]

Create just a single marker and recycle that by setting its position.

[Kile Design]

Now how do I create just a singe marker? heh... I'm doing it this way at the moment:

var aBusinessMarker = new google.maps.Marker({ draggable: true, map: map, position: results[0].geometry.location});

As default there's no marker on the map. But when a user types into the "address"-field, and leaves the field (onBlur-trigger), the map updates and places the marker. Now, if the user goes back to the field and types another address; Just change the existing marker location... hehe...

I've just worked with google maps for a couple of days here, so if it is in the documentation somewhere - well explained - so please tell/show me where...

[Esa]

If you change that line to following, the marker will be created only
at the first onBlur. Second+ time it doesn't do anything.

var aBusinessMarker = aBusinessMarker || new

google.maps.Marker({ draggable: true, map: map,
position: results[0].geometry.location});

Add a second line that positions the marker every time:

aBusinessMarker.setPosition(results[0].geometry.location);

If you post a link to your page under work, you get better advice.

[Kile Design]

Hi again...
Finally got the time to put up a page here : http://thomaskile.me/testarea/google-maps-registration/

So I tried what you suggested, but it keeps adding more markers... Tried with some if/else statements, but got same result at best. If not, the whole thing stopped working for me...
The google javascript file is named: tmp.googleMaps.js

[Rossko]

> So I tried what you suggested, but it keeps adding more markers...

If you create your lone marker as a variable in global scope, you will
be able to access it to re-use it later.

[Kile Design]

wow! so easy...
thanks a lot Rossko... now everything seems to be working the way I want... awesome...