Aradım bulamadım GOOGLE'da

<script language="JavaScript"><!--

//Javascript Created by Computerhope http://www.computerhope.com

//store the quotations in arrays

images = new Array(4);

images[0] = "<a href = 'http://www.computerhope.com/index.htm'><img src='http://www.computerhope.com/banners/banner.gif' alt='Visit Computer Hope'></a>";

images[1] = "<a href = 'http://www.computerhope.com/history/index.htm'><img src='http://www.computerhope.com/banners/banner2.gif' alt='Computer History'></a>";

images[2] = "<a href = 'http://www.computerhope.com/index.htm'><img src='http://www.computerhope.com/banners/banner3.gif' alt='Visit Computer Hope'></a>";

images[3] = "<a href = 'http://www.computerhope.com/newslet.htm'><img src='http://www.computerhope.com/banners/banner4.gif' alt='Computer Hope Newsletter'></a>";

index = Math.floor(Math.random() * images.length);

document.write(images[index]);

//done

// --></script><br>