private void presentationInit()
{
button_presentation_restore_screen.Sensitive = false;
// button_presentation_stop.Sensitive = false;
presentation = new WebKit.WebView();
scrolledwindow_presentation.Add(presentation);
//presentation.Open("file:///home/xavier/informatica/progs_meus/mono/navegador-gtk-html/prova.html");
presentationOpenStatic("http://www.chronojump.org");
presentation.ShowAll();
}