Now in webstudio, drag on an HTML object attach the above image (or use one of your own). Double click on it and paste in this cool bit of css / javascript / html combo
<img src="$thisfolderurl$ridge.gif" style="width:100px;
border:2px solid black;" onmouseover="this.style.width='400px'" onmouseout="this.style.width='100px'" alt="" title="" />