如何在boostrap中选择选项列表项后启用/禁用下拉字段

Question

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<div class="form-group">
                                    <label class="col-sm-2 control-label">Category</label>
                                    <div class="col-sm-6">
                                        <select class="form-control m-bot15">
											<option>All Students</option>
                                            <option>Faculty</option>
                                            <option>Department</option>
                                            <option>Program</option>
										</select>
                                    </div>
                                </div>
								<div class="form-group">
                                    
									<div class="col-sm-4">
                                        <select class="form-control m-bot15">
                                            <option>Faculty of Science</option>
                                            <option>Faculty of Arts</option>
                                            <option>Faculty of Management</option>
										</select>
                                    </div>
									<div class="col-sm-4">
                                        <select class="form-control m-bot15">
                                            <option>Department of mathematics</option>
                                            <option>Department of Statistics</option>
                                            <option>Department of Biology</option>
										</select>
                                    </div>
									<div class="col-sm-4">
                                        <select class="form-control m-bot15">
                                            <option>Architecture Program</option>
                                            <option>Computer science Program</option>
                                            <option>Chemical Engineering Program</option>
										</select>
                                    </div>
                                </div>		

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`如何在使用Javascript选择另一个表单项（下拉列表1）后启用/禁用引导程序中的表单项（下拉菜单1）字段。 这是我的表单项Image

的图片