div#top {width: 300px; height: 458px; }
div#down {width: 300px; height: 100px; }
div#float1 {float: left; width: 800px; height: 100px; }
div#float2 {float: left; width: 300px; height: 100px; }
a {text-decoration: none;} 
a:hover img {border: 0; }
a:visited img {border: 0; }

img {border: 0; }