#keyboard {
margin: 0;
padding: 0;
list-style: none;
width:270px;
height:375px;
-webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -o-user-select: none;
  user-select: none;

}
    #keyboard li {
    float: left;
    margin: 0 5px 5px 0;
    width: 80px;
    height: 80px;
    line-height: 80px;
    font-size:25px;
    font-weight: bold;
    color:black;
    text-align: center;
    background: #fff;
    border: 2px solid #151414;
    -moz-border-radius: 5px;
    -webkit-border-radius: 5px;
    }
    .on {
        display: none;
        }
        
          
        #keyboard li:hover {
        position: relative;
        top: 1px;
        left: 1px;
        border-color: #e5e5e5;
        cursor: pointer;
        }