Sounds like you are asking about a checkbox/radio button that exists over the image that you can 'check'. Several ways to do it, the easiest would be to use the IMAGE as the background for the box (perhaps a div) and position a checkbox in that div. (e.g., div has ID="containerFor_imageabc" and the checkbox would have name and id "checkboxFor_imagabc"). Then your "do something" link/button could know which checkboxes are checked.
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