<select id="language" data-placeholder="选择类别..." class="chosen-select" multiple style="350px;" tabindex="2"> <option value="E">英语</option> <option value="F">法语</option> <option value="C">汉语</option> </select> $("#language").change(function() { console.log($(this).val()); });
https://harvesthq.github.io/chosen/#optgroup-support