modal模态框插件

用法：

    <!--模态框-->
    <div class="modal fade" id="myModal">
        <div class="modal-dialog">
            <div class="modal-content">
                <div class="modal-header">
                    <button type="button" class="close" data-dismiss="modal">
                        <span>&times;</span>
                    </button>
                    <h4 class="modal-title">会员登录</h4>
                </div>
                <div class="modal-body">
                    <div class="container-fluid">
                        <div class="col-md-4">1</div>
                        <div class="col-md-4">1</div>
                        <div class="col-md-4">1</div>
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-primary">登录</button>
                    <button type="button" class="btn btn-default">注册</button>
                </div>
            </div>
        </div>
    </div>

    <!--点击模态框显示-->
    <button type="button" class="btn btn-primary" data-toggle="modal" data-target="#myModal" data-backdrop="false">登录</button>