This javascript cut & paste code will allow you to rotate a series of banners each time a new visitor enters your web site (Example Shown Above). Also works on page refreshing as well. 

Insert this code into your HEAD of HTML

<!-- // == This Script Free To Use Providing This Notice Remains == // // == This Script Has Been In The http://www.DesignerWiz.com Javascript Public Archive Library == // // == NOTICE: Though This Material May Have Been In A Public Depository, Certain Author Copyright Restrictions May Apply == // --><script language="JavaScript" type="text/javascript"> <!-- Begin var how_many_ads = 3; var now = new Date() var sec = now.getSeconds() var ad = sec % how_many_ads; ad +=1; if (ad==1) { txt="Cool Resources & JavaScripts"; url="http://designerwiz.com/"; alt="Cool Resources & JavaScripts"; banner="http://www.designerwiz.com/JavaScripts/bannereffects/bannerexamp1.gif"; width="468"; height="60"; } if (ad==2) { txt="Cool Resources & JavaScripts"; url="http://designerwiz.com/"; alt="Cool Resources & JavaScripts"; banner="http://www.designerwiz.com/JavaScripts/bannereffects/bannerexamp2.gif"; width="468"; height="60"; } if (ad==3) { txt="Cool Resources & JavaScripts"; url="http://designerwiz.com/"; alt="Cool Resources & JavaScripts"; banner="http://www.designerwiz.com/linkaffil_images/bcentral1.gif"; width="468"; height="60"; } document.write('<center>'); document.write('<a href=\"' + url + '\" target=\"_top\">'); document.write('<img src=\"' + banner + '\" width=') document.write(width + ' height=' + height + ' '); document.write('alt=\"' + alt + '\" border=0><br>'); document.write('<small>' + txt + '</small></a>'); document.write('</center>'); // End --> </script>

Simply Cut and Paste code snippet
Be sure to properly place script position in HEAD of html
Configure the banner image, URL, alt text, toolbar message to preferences
Add as many banners as needed by replicating a new banner command for as many as you  need
Be sure to insert the exact amount of banners needed to be shown were indicated in the script and your done

This script has been in the DesignerWiz.com Public Library.