#title{
    width: 260px;
    position: absolute;
    background-color: rgb(249,249,249);
    border-radius: 20px;
    padding: 10px;
    margin-top: 10px;
    word-wrap: break-word;
    display: none;
    font:12px "microsoft yahei";
}
#title:after{
    content: "\00a0";
    display: block;
    position:absolute;
    top:15px;
    left: -20px;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 10px 20px 10px 0px;
    border-color: transparent rgb(249,249,249) transparent transparent;
}