How can i do this with javascript

Hello, I have two different javascript files

1.

<script type="text/javascript"><!--
google_ad_client = "pub-7792533794990667";
/* Ads.ChristopherLeeMaher.Com/728x90/1.html */
google_ad_slot = "9314436397";
google_ad_width = 728;
google_ad_height = 90;
//-->
</script>
<script type="text/javascript"
src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script>

Code (markup):

2.

<script language="javascript" type="text/javascript" src="http://js.mystatichost.com/?width=728&height=90"></script>

Code (markup):

How Can i make it so when the page loads its random? like a random image but its a random ad?

Thanks,
Chris

 

I think what you need is a adrotator script. Just google for "javascript adrotator" and you should be able to find it, my friend.