Google map api V2 Marker Issue

var marker;
var marker_list = [];
                    for (iLoopIndex=0;iLoopIndex<10;iLoopIndex++)
                    {
                        centerPoint = new GLatLng(32+iLoopIndex,68+iLoopIndex);
                        alert(centerPoint);
                        map.setCenter(centerPoint);

                        blueIcon = new GIcon(G_DEFAULT_ICON);
                        blueIcon.image = \"truck.png\";
                        blueIcon.iconSize = new GSize(40, 20);

                        // Set up our GMarkerOptions object
                        markerOptions = { icon:blueIcon };
                        //map.addOverlay(new GMarker(centerPoint, markerOptions));
                        marker = new GMarker(centerPoint, markerOptions);

                        GEvent.addListener(marker, \"click\", function() {
                        marker.openInfoWindowHtml(\"iLocator <b>\"+Myarr[2]+\"</b>\");
                        marker_list.push(marker);
                     });
                        map.addOverlay(marker);
                    }//End for

for (iLoopIndex=0;iLoopIndex<marker_list.length;iLoopIndex++)
{
    map.removeOverlay(marker_list[iLoopIndex]);
}