<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
    <div class="modal-dialog" role="document">
        <div class="modal-content">
            <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
                <h4 class="modal-title" id="myModalLabel">新增</h4>
            </div>
            <div class="modal-body">

                <div class="form-group">
                    <label for="txt_departmentname">部门名称</label>
                    <input type="text" name="txt_departmentname" class="form-control" id="txt_departmentname" placeholder="部门名称">
                </div>
                <div class="form-group">
                    <label for="txt_statu">描述</label>
                    <input type="text" name="txt_statu" class="form-control" id="txt_statu" placeholder="状态">
                </div>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-default" data-dismiss="modal"><span class="glyphicon glyphicon-remove" aria-hidden="true"></span>关闭</button>
                <button type="button" id="btn_submit" class="btn btn-primary" data-dismiss="modal"><span class="glyphicon glyphicon-floppy-disk" aria-hidden="true"></span>保存</button>
            </div>
        </div>
    </div>
</div>

JS部分：

 function insert() {
        console.log("123");
        $("#myModalLabel").text("新增");
        $('#myModal').modal();
    }