JSFiddle - React, Tailwind, and code Playground

HTML

<div id="page">
    <br /> ...
    <br />
    <div id="ad_container"></div>
    <br />
    <br /> ...
    <br /> 
</div>

CSS

#page {
    text-align:center; 
    background:#CCCCCC; 
}

#ad_container {
    margin:0 auto; 
    padding:6px; 
    width:480px; 
    background:#FFFFAA; 
}

JavaScript

var bannerdata = [
    
    'Ich bin Banner Nr. 1 ... lima-city: kostenloser Webspace <br/> <a href="https://www.lima-city.de/?ref=246803/" target="_blank"><img src="http://www.lima-city.de/images/banner/lima-city_468x60_2.gif" alt="Gratis werbefreier Webspace | lima-city: kostenloser Webspace" title="Gratis werbefreier Webspace | lima-city: kostenloser Webspace" border="0"/></a> <br/> Jetzt kostenlosen Webspace holen', 
    
    'Ich bin Banner Nr. 2 ... lima-city: kostenloser Webspace <br/> <a href="https://www.lima-city.de/?ref=246803/" target="_blank"><img src="http://www.lima-city.de/images/banner/lima-city_468x60_3.gif" alt="Gratis werbefreier Webspace | lima-city: kostenloser Webspace" title="Gratis werbefreier Webspace | lima-city: kostenloser Webspace" border="0"/></a> <br/> Jetzt kostenlosen Webspace holen', 
    
    'Ich bin Banner Nr. 3 ... lima-city: kostenloser Webspace <br/> <a href="https://www.lima-city.de/?ref=246803/" target="_blank"><img src="http://www.lima-city.de/images/banner/next-level_468x60_1.gif" alt="Gratis werbefreier Webspace | lima-city: kostenloser Webspace" title="Gratis werbefreier Webspace | lima-city: kostenloser Webspace" border="0"/></a> <br/> Jetzt kostenlosen Webspace holen',  
    
];


var brun = 0;
var refresh_time = 3000;
var maxb = bannerdata.length;

$(document).ready(function () {
    var bannerhtml = bannerdata[brun];

    $('#ad_container').html("<span>" + bannerhtml + "</span>\n");

    refreshIntervalId = window.setInterval(function () {
        brun++;
        if (3 <= brun) {
            /* clearInterval(refreshIntervalId); */
            brun = 0;
        }

        var bannerhtml = bannerdata[brun];
        $('#ad_container').html("<span>" + bannerhtml + "</span> \n");

    }, refresh_time);

});