I have the form and some code below. 

```
@using (Html.BeginForm("Insert", "Question", "POST"))
{
    <div id="add_tag">
        <div id="list_tag">
            <span class="post-tag" id="2">Phi kim<span class="delete-tag" title="Xóa Tag này"></span></span>
            <span class="post-tag" id="22">Hóa Vô Cơ<span class="delete-tag" title="Xóa Tag này"></span></span>
            <span class="post-tag" id="1">Lý<span class="delete-tag" title="Xóa Tag này"></span></span>
        </div>
        <div class="tag-suggestions hidden">
        </div>
    </div>
    <div class="form-sumit clear">
        <input type="submit" id="submit-button" value="Post your question" />
    </div>
}

```

And my Insert action in QuestionController like this

```
    [HttpPost]
    [ValidateInput(false)]
    public ActionResult Insert(FormCollection _form)
    {
        //my code here
    }

```

I want to get id of span tag nested in by using Html.BeginForm and FormCollection. How can I do that? Plz someone help me. Thanks a lot.