////// Teoria e pratica
  var stile = "top=0, left=0, width=450, height=500, status=no, menubar=no, toolbar=no, scrollbars=yes, resizable=no";
     function teoria(apri) {
        window.open(apri, "", stile);
     }

var stile = "top=0, left=0, width=450, height=500, status=no, menubar=no, toolbar=no, scrollbars=yes, resizable=no";
     function pratica(apri) {
        window.open(apri, "", stile);
     }

var stile = "top=0, left=0, width=450, height=500, status=no, menubar=no, toolbar=no, scrollbars=yes, resizable=no";
     function workshop(apri) {
        window.open(apri, "", stile);
     }