function MM_openBrWindow(theUrl, winName, features) {
secondWindow=window.open(theUrl, winName, features);
}

function open_win() {
        MM_openBrWindow('okno','status=no,resizable=no,menubar=no,scrollbars=no,toolbar=no');
        //this.window.close;
        document.close;
        //window.etna.focus;
}