How could I control a set percentage of people that have a specific experience?
<p>I am trying to figure out a way to have say 10% of the traffic to the site have a unique experience (a modal pop-up).  In my previous trial I set up an A/B test with Google Web Optimizer and throttled the experience by creating two versions of the page, one with and one without the modal pop-up scripts.  I dont care about the stats, I just want to control the percentage of people that see it.</p>

<p>Can anyone thing of a javaScript solution (no jQuery solutions please, this does not jive well with the old version of Prototype I am stuck with on this site).</p>
