Displaying an Image vs Message for Syndicated Chat Widget

Content

I have searched around and tried to find if there is a way to display a different image depending on if chat is available or  not available (typically outside chat hours).

I can get the image to show and be the "link" when chat is available, but when it is not I can either hide entire widget or it is just a image (link is dead) I would like to display a whole different image when the chat is not available.

Thanks,

--Charles