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I would like to create an option in a form like [] I would like to order a [selectbox with pizza] pizza where selectbox is enabled only when checkbox is checked and disabled when not checked. I come up with this code: <form> <input type="checkbox" id="pizza" name="pizza" value="yes"> <label for="pizza"> I would like to order a</label> <select name="pizza_kind"> <option>(choose one)</option> <option value="margaritha">Margaritha</option> <option value="hawai">Hawai</option> </select> pizza. </form> <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"> </script> <script> var update_pizza = function () { if ($("#pizza").is(":checked")) { $("#pizza_kind").removeAttr("disabled"); } else { $("#pizza_kind").prop('disabled', 'disabled'); } }; $(update_pizza); $("#pizza").change(update_pizza); </script> I tried various methods how to set disabled attribute using .prop() , .attr() , and .disabled= . However, nothing happens. When applying to a <input type="checkbox"> instead of <select> , the code works perfectly. How to disable/enable <select> using jQuery?

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