<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script> <script src="//code.jquery.com/jquery-1.11.1.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="container"> <div class="row"> <form method="get"> <div class="form-group"> <div class="col-md-3"><label class="btn btn-primary"><img src="http://content.nike.com/content/dam/one-nike/globalAssets/menu_header_images/OneNike_Global_Nav_Icons_Running.png" alt="..." class="img-thumbnail img-check"><input type="checkbox" name="chk1" id="item4" value="val1" class="hidden" autocomplete="off"></label></div> <div class="col-md-3"><label class="btn btn-primary"><img src="http://content.nike.com/content/dam/one-nike/globalAssets/menu_header_images/OneNike_Global_Nav_Icons_Basketball.png" alt="..." class="img-thumbnail img-check"><input type="checkbox" name="chk2" id="item4" value="val2" class="hidden" autocomplete="off"></label></div> <div class="col-md-3"><label class="btn btn-primary"><img src="http://content.nike.com/content/dam/one-nike/globalAssets/menu_header_images/OneNike_Global_Nav_Icons_Football.png" alt="..." class="img-thumbnail img-check"><input type="checkbox" name="chk3" id="item4" value="val3" class="hidden" autocomplete="off"></label></div> <div class="col-md-3"><label class="btn btn-primary"><img src="http://content.nike.com/content/dam/one-nike/globalAssets/menu_header_images/OneNike_Global_Nav_Icons_Soccer.png" alt="..." class="img-thumbnail img-check"><input type="checkbox" name="chk4" id="item4" value="val4" class="hidden" autocomplete="off"></label></div> </div> <input type="submit" value="Check Item" class="btn btn-success"> </form> </div> </div> </body> </html>

.check { opacity:0.5; color:#996; }

$(document).ready(function(e){ $(".img-check").click(function(){ $(this).toggleClass("check"); }); });