.sideBar{
    width:80px;
    height: 310px;
    position: fixed;
    top: 55%;
    right: 0;
    z-index: 9999;
    margin-top: -200px;
    -webkit-transition: all 0.3s;
    -moz-transition: all 0.3s;
    -ms-transition: all 0.3s;
    -o-transition: all 0.3s;
    transition: all 0.3s;

}

.sideBar .itm{
    width: 80px;
    height: 50px;
    margin-bottom: 1px;
    position: relative;
    cursor: pointer;
}
.sideBar .mm{
    background: url(/style_css/茂名.jpg) no-repeat;
    background-size: cover;
} 
.sideBar .mn{
    background: url(/style_css/茂南.jpg) no-repeat;
    background-size: cover;
} 
.sideBar .hz{
    background: url(/style_css/化州.jpg) no-repeat;
    background-size: cover;
} 
.sideBar .db{
    background: url(/style_css/电白.jpg) no-repeat;
    background-size: cover;
} 
.sideBar .gz{
    background: url(/style_css/高州.jpg) no-repeat;
    background-size: cover;
} 
.sideBar .xy{
    background: url(/style_css/信宜.jpg) no-repeat;
    background-size: cover;
}