부트스트랩 navbar 가운데 로고 넣기

<div class="container">
      <!-- 상단 네비게이트 바 -->
      <div class="navbar nav-tabs navbar-fixed-top" style="background-color:white; border-bottom:1px solid gray">
            <div class="container">
                <!-- 왼쪽 메뉴 버튼 -->
                <div class="col-xs-3" style="background-color:white">
                      <button type="button" class="btn btn-default" style="margin-top:4px">
                      <span class="glyphicon glyphicon-align-justify" style="font-size:25px"></span>
                      </button>
                </div>

                <!-- 가문데 로고 -->
                <div class="col-xs-6" style="background-color:white-space; text-align:center; display:inline-block;">
                      <button type="button" class="btn btn-default btn-lg" style="margin-top:2px">
                       트래블쉽
                      </button>

                </div>

                <!-- 오른쪽 로그인, 회원가입-->
                <div class="col-xs-3" style="background-color:white">
                      <button type="button" class="btn btn-default" style="margin-top:10px; float:right;">
                      <span class="glyphicon glyphicon-user"> 로그인 </span>
                      </button>
                </div>
            </div>
      </div>
    </div>