function openGenericPopup(pagina, nomepagina, w, h, offsetX, offsetY) {                
         var x = ((screen.width - w) / 2) + offsetX;
         var y = ((screen.height - h) / 2) + offsetY;
         newwin = window.open(pagina, nomepagina, "location=0,menubar=0,statusbar=0,scrollbars=0,toolbar=0,resizable=0,width="+w+",height="+h+",left="+x+",top="+y+",screenX="+x+",screenY="+y);
    }