google map api v3 : update rectangle bounds when the shape is dragged or reseized

//----------on rectangle complete event
     google.maps.event.addDomListener(drawingManager, 'rectanglecomplete', function(rectangle) {
        //get the rectangle bounds
        document.getElementById("savedata").value =rectangle.getBounds();
   //hide draw tool
   drawingManager.setOptions({
       drawingControl: false
           });
   //disable draw tool
   drawingManager.setDrawingMode(null);
     
     //Here the new code
     var rectangle = rectangle.overlay;

     //get new bounds
     google.maps.event.addListener(rectangle, "bounds_changed", function(event) {

	document.getElementById("savedata").value = rectangle.getBounds();

     });
});