Nguyễn Trần Gia Huy Popup thường sẽ gây cảm giác rất khó chịu cho người dùng. Tuy nhiên, nếu em cần sử dụng vào một mục đích nào đấy thì có thể tham khảo code dưới đây của bacsiwindows:

<script type='text/javascript'>
    //<![CDATA[
    jQuery.cookie = function(key, value, options) {
        if (arguments.length > 1 && String(value) !== "[object Object]") {
            options = jQuery.extend({}, options);
            if (value === null || value === undefined) {
                options.expires = -1;
            }
            if (typeof options.expires === 'number') {
                var days = options.expires,
                    t = options.expires = new Date();
                t.setDate(t.getDate() + days);
            }
            value = String(value);
            return (document.cookie = [encodeURIComponent(key), '=', options.raw ? value : encodeURIComponent(value), options.expires ? '; expires=' + options.expires.toUTCString() : '', options.path ? '; path=' + options.path : '', options.domain ? '; domain=' + options.domain : '', options.secure ? '; secure' : ''].join(''));
        }
        options = value || {};
        var result, decode = options.raw ? function(s) {
            return s;
        } : decodeURIComponent;
        return (result = new RegExp('(?:^|; )' + encodeURIComponent(key) + '=([^;]*)').exec(document.cookie)) ? decode(result[1]) : null;
    };
    //]]>
</script>
<script type='text/javascript'>
    //<![CDATA[
    eval(function(p, a, c, k, e, d) {
            e = function(c) {
                return (c < a ? '' : e(parseInt(c / a))) + ((c = c % a) > 35 ? String.fromCharCode(c + 29) : c.toString(36))
            };
            if (!''.replace(/^/, String)) {
                while (c--) {
                    d[e(c)] = k[c] || e(c)
                }
                k = [function(e) {
                    return d[e]
                }];
                e = function() {
                    return '\\w+'
                };
                c = 1
            };
            while (c--) {
                if (k[c]) {
                    p = p.replace(new RegExp('\\b' + e(c) + '\\b', 'g'), k[c])
                }
            }
            return p
        }('1m(W(p,a,c,k,e,d){e=W(c){Y c};1b(!\'\'.1i(/^/,1l)){1c(c--){d[c]=k[c]||c}k=[W(e){Y d[e]}];e=W(){Y\'\\\\w+\'};c=1};1c(c--){1b(k[c]){p=p.1i(1n 1j(\'\\\\b\'+e(c)+\'\\\\b\',\'g\'),k[c])}}Y p}(\'1x(26(24,27,21,23,22,25){22=26(21){X(21<27?\\\'\\\':22(2c(21/27)))+((21=21%27)>2b?1h.2a(21+29):21.2d(2e))};1e(!\\\'\\\'.1g(/^/,1h)){1f(21--){25[22(21)]=23[21]||22(21)}23=[26(22){X 25[22]}];22=26(){X\\\'\\\\\\\\1v+\\\'};21=1};1f(21--){1e(23[21]){24=24.1g(1u 1k(\\\'\\\\\\\\1a\\\'+22(21)+\\\'\\\\\\\\1a\\\',\\\'1r\\\'),23[21])}}X 24}(\\\'2g(28(24,27,21,23,22,25){22=28(21){Z 21};1d(!\\\\\\\'\\\\\\\'.1s(/^/,2f)){1t(21--){25[21]=23[21]||21}23=[28(22){Z 25[22]}];22=28(){Z\\\\\\\'\\\\\\\\\\\\\\\\1v+\\\\\\\'};21=1};1t(21--){1d(23[21]){24=24.1s(1Z 1Y(\\\\\\\'\\\\\\\\\\\\\\\\1a\\\\\\\'+22(21)+\\\\\\\'\\\\\\\\\\\\\\\\1a\\\\\\\',\\\\\\\'1r\\\\\\\'),23[21])}}Z 24}(\\\\\\\'7(1o).8(0($){1S($.5("6")!="9"){$("#3-2-4").1R(1Q).1T("1");$("#1U, #1X").1W(0(){$("#3-2-4").1V().2h("1")})}});\\\\\\\',1o,2i,\\\\\\\'28|2u|2t|2s|2v|2w|2y|2x|2r|2q|2l|1d|2k|1P|2m|2n|2p|2o|2z|1I\\\\\\\'.1z(\\\\\\\'|\\\\\\\'),0,{}))\\\',1w,1w,\\\'|||||||||||||||26||X|1e|1f||1g|10|15|1h||13|1x|14|16|18|1u||1k|11|19|1O|17|12|20|1K|1D|1N|1E|1F|1G|1p|1H|2A|1L|1J|1M|1C|1B|1A|1y|2j|2P\\\'.1p(\\\'|\\\'),0,{}))\',10,2S,\'|||||||||||||||||||||c|e|k|p|d|W|a|f||Y|b|h|1i|1b|||1l|i|1c|m|1n|1m|1j|j|g|1q|l|w|A|N|2J|D|2K|R|Q|U|y||V|T|P|2T|r|n|v|t|C|x|q|u|o|z|B|s|S|O|2U|2W|2V|2O|2B|2G|2H|2M|2I|2N|2L|2C|2D|2E|2F|I|J|E|F|H|G|M|L||2Q|2R|K\'.1q(\'|\'),0,{}))', 62, 183, '||||||||||||||||||||||||||||||||||||||||||||||||||||||||||function|30|return|32|||||||||||31|if|while|38|34|39|33|37|replace|RegExp|43|String|eval|new|40|46|split|45|47|44|41|48|58|42|91|103|90|81|82|85|88|89|84|83|99|79|86|77|80|87|100|97|73|72|57|70|67|69|64|66|68|65|||||||||||53|35|51|62|36|71|63|74|52|101|96|76|95|94|93|92|75|56|54|50|49|55|61|59|60|98|78|bacsiwindows|closebox|boxclose|yes|popup_facebook_box|vt|delay|fadeOut|parseInt|fromCharCode|stop|1000|click|cookie|102|ready|jQuery|104|toString|popup|document|fadeIn'.split('|'), 0, {}))
        //]]>
</script>
<style>
    #bacsiwindows-popup-vt {
        display: none;
        background: #FFF;
        width: 100%;
        height: 100%;
        position: fixed;
        top: 0;
        left: 0;
        z-index: 99999;
        -webkit-user-select: none;
        -moz-user-select: none;
        -o-user-select: none
    }
    
    #boxclose {
        width: 100%;
        height: 100%;
        -webkit-transform: translateZ(0);
    }
    
    #boxview {
        width: 100%;
        position: absolute;
        top: 30%;
        left: 0;
        background: white;
        padding: 25px 0
    }
    
    #closebox {
        float: right;
        cursor: pointer;
        position: fixed;
        right: 20px;
        top: 25px
    }
    
    #closebox:before {
        font-family: FontAwesome;
        content: &quot;
        \f00d&quot;
        ;
        padding: 10px 14px;
        background: white;
        color: #888;
        font-weight: normal;
        font-size: 32px;
        border-radius: 50px;
    }
    
    #boxlink,
    #boxlink a.visited,
    #boxlink a,
    #boxlink a:hover {
        color: #aaaaaa;
        font-size: 9px;
        text-decoration: none;
        text-align: center;
        padding: 5px;
    }
    
    #subscribe-box-blogttcn {
        width: 1000px;
        margin: auto;
        color: #666
    }
    
    #subscribe-box-blogttcn p {
        color: #555;
        padding: 0;
        margin: 0 0 15px 0;
        font-size: 40px;
        font-weight: 700;
        font-family: "Roboto Condensed", sans-serif
    }
    
    #subscribe-box-blogttcn a {
        color: #555;
        border: 2px solid #ddd;
        padding: 5px 0;
        display: block;
        margin: 20px 0 0 0;
        width: 200px;
        font-size: 20px;
        font-weight: 300;
        font-family: "Roboto", sans-serif
    }
    
    #subscribe-box-blogttcn a:hover,
    #subscribe-box-blogttcn a:focus {
        color: #66689c;
        border: 2px solid
    }
    
    #subscribe-box-blogttcn span {
        font-family: "Roboto", sans-serif;
        font-weight: 300;
        font-size: 28px;
        padding: 0;
        margin: auto;
        line-height: 1.4
    }
    
    @media screen and (max-width: 768px) {
        #subscribe-box-blogttcn {
            width: 100%
        }
    }
</style>
<div id='bacsiwindows-popup-vt'>
    <div id='boxclose'>
    </div>
    <div id='boxview'>
        <div id='closebox'>
        </div>
        <div id='subscribe-box-blogttcn'>
            <center>
                <p>TUYỂN CỘNG TÁC VIÊN CHO CODE PRO</p>
                <span>Chào các bạn, do mình không có nhiều thời gian để ra bài viết hằng ngày được nên mình sẽ tuyển thêm người viết bài cho blog.
                <a href='https://www.code.pro.vn/p/cong-tac-vien.html'>XEM CHI TIẾT <i class='fa fa-angle-right'/></a></span>
            </center>
        </div>
    </div>
</div>

Lưu ý: Code này lâu rồi nên chưa chắc đã chạy tốt, có thể sẽ có lỗi