Random Banner Code:

Global Header:

<script type="text/javascript"><!--
// Don't edit this line:
var b = 0, banners = new Array();

// Edit the following.
// Add as many or few banners as you want.
banners[b++] = "Banner URL 1";
banners[b++] = "Banner URL 2";
banners[b++] = "Banner URL 3";

// Don't edit this line:
document.getElementsByTagName("img").item(0).setAttribute("src", banners[Math.floor(Math.random() * banners.length)]);
//--></script>

Code Database:

If you have a Code Database (a forum that serves as a collection of scripts) on your message board, you may paste the following code into that forum to add it your own code list.

[b]Title:[/b] [url=http://proboards.gamingmedley.com/codes/random-banner.html]Random Banner[/url]
[b]Creator:[/b] Unknown
[b]Cross-Browser:[/b] Yes
[b]Placement:[/b] Global Header
[code]<script type="text/javascript"><!--
// Don't edit this line:
var b = 0, banners = new Array();

// Edit the following.
// Add as many or few banners as you want.
banners[b++] = "Banner URL 1";
banners[b++] = "Banner URL 2";
banners[b++] = "Banner URL 3";

// Don't edit this line:
document.getElementsByTagName("img").item(0).setAttribute("src", banners[Math.floor(Math.random() * banners.length)]);
//--></script>[/code]