CSS Kodları :

.reklam{font-family:Arial,Verdana,sans-serif;font-size:13px;font-weight:bold;display:block;height:125px;line-height:125px;width:125px;border: 1px solid #DDDDDD;text-align:center;background:#e9e9e9}
.reklam:hover{border: 1px solid #ccc;color:black;background:#E0E0E0}

Html kodları :

<a class="reklam" href="LINK" rel="nofollow" target="_blank">Reklam Alanı</a>