How to set position of google maps infowindow

The web is on http://esmd.info/index.php?file=MAP


Ant the source with window:

  
   // On page load, call this function
   function load()
   {
      // Create new map object
    map = new GMap2(document.getElementById("map"));  
 
	   // Set map center location	  
	  map.setCenter(new GLatLng(63.13450320833446,16.69921875), 3);
	  
	   // Add Map Controls
       map.addControl(new GSmallMapControl());
       map.addControl(new GMapTypeControl());
	   
      // Create new geocoding object
      geocoder = new GClientGeocoder();
       var bounds = new google.maps.LatLngBounds();
	  
  	  // Download the data in data.xml and load it on the map.
//	   GDownloadUrl("http://esmd.info/index.php?file=map&MAP", function(data) {
      

     GDownloadUrl(  "data.php", function(data) {
          xml = GXml.parse(data);
          markers = xml.documentElement.getElementsByTagName("marker");
          name = [];  
          for (var i = 0; i < markers.length; i++) {
            address = markers[i].getAttribute("address");
            name[address]  = markers[i].getAttribute("name");
            var uid = markers[i].getAttribute("uid");
                  
            markerId = "id_"+i;
            
//            vardas  = "<div id="+markerId+">"+name+"</div>";
             
            geocoder.getLocations(address, addToMap);
            
               
            var point = new google.maps.LatLng(
            parseFloat(markers[i].getAttribute("lat")),
            parseFloat(markers[i].getAttribute("lng")));
                   
           }
        });   
   }
     
  
   function addToMap(response )
   {
              
      // Retrieve the object
      
      place = response.Placemark[0];

      // Retrieve the latitude and longitude
      point = new GLatLng(place.Point.coordinates[1],
                          place.Point.coordinates[0]);
 
   
      marker = new GMarker(   point    );
      GEvent.addListener(marker, "click", function() {
  
      marker.openInfoWindowHtml(   name[response.name] +' ' +  response.name );
      
       
      });
     
      map.addOverlay(marker);
   
  
   }

Code (markup):