With CSS and HTML it is possible to add it like such
xxxxxxxxxx
<div class="wrapWithBackgroundImage">
<a href="#" class="invisibleLink"></a>
</div>
.wrapWithBackgroundImage {
background-image: url( );
}
.invisibleLink {
display: block;
left: 55px; top: 55px;
position: absolute;
height: 55px width: 55px;
}
The top is HTML and the bottom is CSS