I don't think this can be done but would appreciate confirmation either way.
I have a product image on my store that uses code like this, which I cannot edit
<div class="product"><a href="productpage.php"><img id="productimage0" class="productimage" src="images/prod.jpg" style="border:0" alt=" " /></a></div>
That gives me the product image and a link to the information page. What I would like to do is add a graphic on top of that product image showing that it is 20% off this week. I could make just one image with the text included but as the discounts will change I'd prefer to have a more dynamic way of doing things.
I was hoping to do this via css but really don't know how.
I can't alter the source code on the page but can edit the css file.
Thanks for reading
Albrecht