var px_s = 150;
var px_f = 1000;
var px_i = Math.round(Math.random() * px_f);
var px_bg = 'http://ad.2i.cz/pp/' + px_s + '.gif';
var px_img = 'http://ad.2i.cz/pp/i/' + px_i + '.jpg?r=' + escape(Math.random());
var px_link = 'http://www.photopost.cz/ads/i/i.php?i=' + px_i;
document.write(
    '<div style=" width: ' + px_s + 'px; height: ' + px_s + 'px; border: none; overflow: hidden; ">' +
        '<div style=" width: ' + px_s + 'px; height: ' + px_s + 'px; background-image: url(' + px_bg + '); border: none; display: table-cell; text-align: center; vertical-align: middle; ">' +
            '<a href="' + px_link + '" target="_top" style=" border: none; ">' +
                '<img src="' + px_img + '" alt="photopost.cz" style=" border: none; margin: 0; padding: 0; _top: expression(Math.round((' + px_s + ' - this.offsetHeight) / 2) + \'px\'); _position: relative; ">' +
            '</a>' +
        '</div>' +
    '</div>'
);