CAUTION：Provisional headers are shown

[xiangwan]

sorry ,my English is not good.I try to explain what I mean
.
when

"form class='ajax ... '" contains "input type='hidden' ...." and in js file modify input vlaue
or

 $("#form_add").on("eldarion-ajax:modify-data", function ($el,data) {
        return data + "&bookId=" + currentBookId + "&chapterId=" + currentChapterId;
    });

Will cause the error

[xiangwan]

the form look like this

  <div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
            <div class="modal-dialog">
                <div class="modal-content">
                    <form id="form_add" class="form-horizontal ajax" role="form" action="/book/add" method="POST">
                        <div class="modal-header">
                            <button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
                            <h4 class="modal-title" id="myModalLabel">添加</h4>
                        </div>
                        <div class="modal-body" id="div_form_text">
                            <div class="form-group">
                                <label for="txt_name" class="col-sm-2 control-label">名称：</label>
                                <div class="col-sm-10">
                                    <input type="text" class="form-control" id="txt_name" name="name">
                                </div>
                            </div>
                        </div>
                        <div class="modal-body" id="div_form_area" style="display: none;">
                            <div class="form-group">
                                <div class="col-sm-10">
                                    <textarea rows="10" cols="50"></textarea>
                                    <div>*每行输入一个单词，回车换行输入多个单词</div>
                                </div>
                            </div>
                        </div>
                        <div class="modal-footer"> 
                            <button type="button" class="btn btn-default" data-dismiss="modal">取消</button>
                            <button type="submit" class="btn btn-primary">提交</button>
                        </div>
                    </form>
                </div>
            </div>
        </div> 

[stevenjlho]

Look at this article http://segmentfault.com/q/1010000000364871