Popup images appear on my page when I hold the cursor over the category in the top menu

[WendyA]

Hi
In a template I purchased a while back, when I hold my cursor over a category in the top nav buttons it has two pop up images that I definitely did not add. For the time being to make them disappear the images have been renamed but I am unable to source/figure out how to stop them from popping up. Can anyone suggest something to try?
The 2 images have been renamed as 'BOXING' for now until I can figure out what to do, they are actually images of ladies accessories, nothing to do with our website. 
Your suggestions are greatly appreciated