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<!DOCTYPE html> <html> <head> <script src="/lib/jquery-1.12.2.min.js"></script> <script> $(document).ready(function(){ $(":checkbox").wrap("<span style='background-color:red'>"); }); </script> </head> <body> <form action=""> Name: <input type="text" name="user"><br> I have a bike: <input type="checkbox" name="vehicle" value="Bike"><br> I have a car: <input type="checkbox" name="vehicle" value="Car"><br> I have an airplane: <input type="checkbox" name="vehicle" value="Airplane"><br> <input type="submit"> </form> <p>Note: We use jQuerys .wrap method to highlight the selected elements, because Firefox does not support background color on checkboxes.</p> </body> </html>