#tooltip
    {
        text-align: center;
        color: #fff;
        background: #111;
        position: absolute;
        z-index: 100;
        padding: 15px;
    }
    
    #tooltip:after /* triangle decoration */
    {
        width: 0;
        height: 0;
        border-left: 10px solid transparent;
        border-right: 10px solid transparent;
        border-top: 10px solid #111;
        content: '';
        position: absolute;
        left: 50%;
        bottom: -10px;
        margin-left: -10px;
    }
    
    #tooltip.top:after
    {
        border-top-color: transparent;
        border-bottom: 10px solid #111;
        top: -20px;
        bottom: auto;
    }
    
    #tooltip.left:after
    {
        left: 10px;
        margin: 0;
    }
    
    #tooltip.right:after
    {
        right: 10px;
        left: auto;
        margin: 0;
    }