I have a presentation with a number of text and an image field in it. I added a script to the head of the presentation in HTML which loads random data from a json page and modifies the text and image fields based on that data. When the presentation first gets run, the data loads nicely and changes all of the fields. The problem I have is that the data then gets cached and doesn't run the script the second and third and all subsequent times though the presentation. Is there a way to force it to rerun that script so that it gets different random data the next time?