Styled checkboxes script

I'm looking for a script that allows me to have multiple images (could be icons as well). Once someone clicks the the image / icon it becomes a different color. Only one image / icon can be highlighted at the same time.

Why do I need this? I need a form with multiple categories. Each image / icon represents a category. When submitting the form I need to have the value of the highlighted image / icon.

I guess the form would need checkboxes with some kind of css hiding the checkbox itself and showing an image / icon in stead? Could someone help me out with this? Not a clue how to start...