div { padding: 5px; background: #f0f0f0; height: 100px; width: 100px; text-align: center; }
div.current { background: #ddd; } 
a { line-height: 100px; font-size: 0; }
img { border: 0; vertical-align: middle; }
body,html { margin: 0; padding: 0; }