Syncing multiple viewers? about imgviewer HOT 1 CLOSED

var $img1 = $('#image1');
var $img2 = $('#image2');
$img1.imgViewer({
    onUpdate: function() {
          var zoom2 = $img2.imgViewer("option",zoom);
          if (zoom2 !==  this.options.zoom)
                 $img2.imgViewer("option",zoom, this.options.zoom);
          var view2 = $img2.imgViewer(getView);
          var view = this.getView();
          if (view2.left !== view.left || view2.right !== view.right || view2.top !== view.top || view2.bottom !== view.bottom  ) 
                 $img2.imgViewer("panTo",(view.left+view.right)/2, (view.top+view.bottom)/2));
    }
});
$img2.imgViewer({
    onUpdate: function() {
          var zoom1 = $img1.imgViewer("option",zoom);
          if (zoom1 !==  this.options.zoom)
                $img1.imgViewer("option",zoom, this.options.zoom);
          var view1 = $img1.imgViewer(getView);
          var view = this.getView();
          if (view1.left !== view.left || view1.right !== view.right || view1.top !== view.top || view1.bottom !== view.bottom  ) 
                $img1.imgViewer("panTo",(view.left+view.right)/2, (view.top+view.bottom)/2));
    }
});