#rightmenu {
    position: absolute;
    width: 250px;
    background-color: #fff;
    left: 5px;
    top: 60px;
}

.notice{
    border:2px dashed lightblue;
    background-color: lightblue;




}
.indexside {
     border:2px inset #d1d1d1;

}
.r-side{
    margin:2px;
}
.notice p {
    text-indent:1em;
    margin: 5px;
    font-size: 16px;
    color: #ff9310;
    font-weight: bold;
}
#go_top {
    float:right;
    position:fixed;
    bottom:30px;
    right:20px;
  
    display: none;

}
<link type="text/css" rel="stylesheet" href="https://bootswatch.com/spacelab/bootstrap.min.css"/>