.dyw_floadAd { position: absolute;z-index: 999900; display: none; }
                            .dyw_floadAd .item { display: block; }
                            .dyw_floadAd .item img { vertical-align: bottom; }
                            @media only screen and (min-width: 240px){
                                .dyw_floadAD{
                                    display: none;
                                    z-index: -11111;
                                }
                            }