You should use jQuery to remove your target4 element from your page.
<script> $(document).ready(function() { $("#target1").css("color", "red"); $("#target1").prop("disabled", true); $("#target4").remove(); }); </script> <!-- Only change code above this line. --> <div class="container-fluid"> <h3 class="text-primary text-center">jQuery Playground</h3> <div class="row"> <div class="col-xs-6"> <h4>#left-well</h4> <div class="well" id="left-well"> <button class="btn btn-default target" id="target1">#target1</button> <button class="btn btn-default target" id="target2">#target2</button> <button class="btn btn-default target" id="target3">#target3</button> </div> </div> <div class="col-xs-6"> <h4>#right-well</h4> <div class="well" id="right-well"> <button class="btn btn-default target" id="target4">#target4</button> <button class="btn btn-default target" id="target5">#target5</button> <button class="btn btn-default target" id="target6">#target6</button> </div> </div> </div> </div>