How To Remove Options From Dropdown : I have 2 dropdown's. 1 is for user to pick 'time from', The 2nd is to pick 'time until'. In order to assure the user does not pick a time on the second dropdown that is b4 the 1st time. I want to remove from the second dropdown all times that are earlier then the time picked in the 1st dropdown  {via javascript). How can I do this?


    <select class="fromWhen form-control" name="From" id="">
                            <option value=""></option>
                            <option value="12:00:00">12:00 PM</option>
                            <option value="12:30:00">12:30 PM</option>
                            <option value="13:00:00">1:00 PM</option>
                            <option value="13:30:00">1:30 PM</option>
                            <option value="14:00:00">2:00 PM</option>
                        </select>
                       
                       
                        <select class="untilWhen form-control " name="Until" id="">
                            <option value=""></option>
                            <option value="12:00:00">12:00 PM</option>
                            <option value="12:30:00">12:30 PM</option>
                            <option value="13:00:00">1:00 PM</option>
                            <option value="13:30:00">1:30 PM</option>
                            <option value="14:00:00">2:00 PM</option>
                        </select>