gmap auto popup info window issue

Hi All,

I have one issue on google maps.

I have installed gmaps,location and all required moduels for maps.

Now i am getting map with a marker whick is pointing a location and a info window is displaying when clicked on the marker.

But my requirement is,the info window need to display bydefault i.e when the page is loading.

Please suggest me what gmap macro attribute i have to use to get info window by default.

Now i am using marker [gmap |id=nodemap|center=40,0|zoom=4|width=600px|height=300px|type=map]

Thanks inadvance,

Chandra Sekhar Y.