#floorplan-overlay {
    position: fixed;
    top:0;
    left:0;
    width: 209px;
	height: 281px;
    border: 1px solid #aaa;
    background: #fff;
    z-index: 10;
    opacity:0.5;
  }

      .room-no-btn {
        position: absolute;
        background: #0ff;
        border: 1px solid #444;
        border-radius: 50%;
        width: 32px;
        height: 32px;
        text-align: center;
        line-height: 32px;
        cursor: pointer;
        font-weight: bold;
        opacity: 0.8;
      }

      /* 色が変わったとき用のクラス */
      .active-btn {
        background: #f00;
      }

#room1-btn { top: 165px; left: 131px; }
#room2-btn { top: 165px; left: 38px; }
#room3-btn { top: 45px; left: 38px; }
#room4-btn { top: 64px; left: 152px; }
#room5-btn { top: 68px; left: 101px; }
#room6-btn { top: 30px; left: 98px; }
#room7-btn { top: 234px; left: 37px; }