.chat_box .menu{text-align:center}
body #chat_window .chat_box .menu .top {
    background-position: 0px -60px;
    background-color: #b0b0b0;
}

#chat_window .chat_box .menu #go_top span{position:absolute;bottom:10px;width:100%;display:block;font-weight:bold;color:#fff}
@media screen and (max-width:1000px){
#chat_window .chat_box .menu #go_top span{font-size:12px;bottom:5px}
    #chat_window .chat_box .menu #go_top {
        background-position: center -62px;
    }
body #chat_window{right:28.5px}
}