chose.jquery 多选

<select id="language" data-placeholder="选择类别..." class="chosen-select" multiple style="width: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