Disable Server Side Caching to get a new CAPTCHA question.

[pstoneking]

I am working on developing a CAPTCHA plugin for vBulletin 5. The issue I am running into is that it does a remote call to fetch javascript and html to embed into the page.

This only occurs once even after a page refresh for the registration page. So the same CAPTCHA question appears twice instead of fetching a new one when the page is loaded.

So my question is, is there a way to disable server side caching for a plugin to work properly? Or, would there have to be some javascript magic at work to do the refreshing?