Runtime error when setting non-static handler on event

[V0d01ey]

This sample code gives a runtime error on event handling after setting an event handler by method
public void SetHandler(Elt el).

    [JavaScript]
    class JSUtils
    {
        public int ff = 3;

        public void SetHandler(Elt el)
        {
            el.OnMouseDown(BodyMouseDownHandler);
        }

        public void BodyMouseDownHandler(WebSharper.JavaScript.Dom.Element el, WebSharper.JavaScript.Dom.Event ev)
        {
            JS.Window.Alert("mousedown on divEl. JSUtils.ff = " + ff);
        }
    }

[Jand42]

@V0d01ey Thanks for the report, I am looking into this.