#bottom_nav{   
    border-top:#90B622 1px solid;
    position:fixed;
    bottom:0;
    width:100%;
    background-color:#eeeeee;
}
#bottom_nav ul{
    list-style:none;
    margin:0;
    padding:0;
}
#bottom_nav li{
    float:left;
    width:50%;
    text-align:center;
    height:3rem;
}
#bottom_nav li a{
    text-decoration:none;
}
.btimg{
    width:100%;
    height:1.5rem;
    text-align:center;
}
.btimg img{
    width:1.2rem;
    height:1.2rem;
    margin-top:0.3rem;
}
.btfont{
    width:100%;
    height:1.5rem;
    text-align:center;
    font-size:0.8rem;
    color:#555555;
    margin-top:0.1rem;
}