function finestra(url_pag,windowsname,dime,dimes,left,top){
        var hWnd=window.open(url_pag,windowsname,"toolbar=no,width="+dime+",height="+dimes+",left="+left+",top="+
        top+",directories=no,status=no,statusbar=yes,resizable=no,menubar=no,scrollbars=yes,location=no");
        if(!hWnd.opener) hWnd.opener=self;
        if(hWnd.focus!=null) hWnd.focus();
        }