private void on_click(WebKit.DOM.EventTarget target, WebKit.DOM.Event event)
    {
        try
        {
            //var image = (WebKit.DOM.HTMLImageElement)target;
            //image.set_attribute("class", "clickable-img-hover");
        }
        catch(GLib.Error e)
        {

        }
    }

public static void webkit_web_extension_initialize (WebKit.WebExtension web_extension)
{
    string PROG = "[webkit2_webextension_minimal_so.so] ";

    print(PROG + "PLUGIN activated\n");

    web_extension.page_created.connect((extension, web_page)=> {
        print(PROG + "SIGNAL: page_created\n");





      try {



var dom = web_page.get_dom_document();

WebKit.DOM.Element img = dom.create_element("img");
img.set_attribute("src", "file:///home/o/avatar.png");
img.set_attribute("alt", "avatar-1.jpg");
((WebKit.DOM.EventTarget) img).add_event_listener_with_closure("click", on_click, false);
dom.body.insert_before(img, null);


} catch (FileError e) {

    stdout.printf ("Message: \"%s\"\n", e.message);
        stdout.printf ("Error code: FileError.EXIST = %d\n", e.code);
        stdout.printf ("FileErrors identification: %" + uint32.FORMAT + "\n", e.domain);

    }


        web_page.send_request.connect((request)=>
        {


            if(request.uri.has_prefix("http://www.google") || request.uri.has_prefix("data")){
                print(PROG + "SIGNAL: send request [REJECTED] " + request.uri + "\n");
                return true;  // true => block query
            }
            print(PROG + "SIGNAL: send request " + request.uri + "\n");
            return false;
        });

        return;
    });

}