Fashionista banner responsive code

I am using fashionista theme
I am trying to make the ads banner responsive, the plugin am using to generate the banner is called advanced advertising system.
I have followed a few tutorials but they all seem to focus on banner images, and do not apply to what I am doing.

idealy I need the banner to be responsive regardless of the image thats loaded as the i have a few images rotating.
can anyone help please
Thanks alot