.onpagenavigation {
    overflow: hidden;
    margin-bottom: 20px;
    clear: both;
}

.onpagenavigation ul {
    display: block;
}

.onpagenavigation ul li {
    float: left;
    width: 150px;
    height: 150px;
    background-color: #fff;
    margin-right: 1px;
}

.onpagenavigation ul li a {
    display: table-cell;
    width: 150px;
    height: 150px;
    color: #000;
    text-align: center;
    vertical-align: middle;
}

.onpagenavigation ul li img {
    width: 50px;
    height: auto;
}