function preview(URLtoOpen, windowName, windowFeatures) {
        newWindow=window.open(URLtoOpen, windowName, windowFeatures);
    }
/*
<a href='javascript:top.window.close();'><img alt="Bezárás" title="Bezárás" src='download.html?id=<?=$_GET['i']?>&amp;type=<?=$_GET['t']?>'></a>
*/