.fondo_amarillo {  background-color: #FFFF99}
a:active {  text-decoration: none}
a:hover {  text-decoration: none; background-color: #99FF00}
a:link {  text-decoration: none}
a:visited {  text-decoration: none}
.subrayado {  text-decoration: underline}
BODY {SCROLLBAR-FACE-COLOR:#000000;
      SCROLLBAR-HIGHLIGHT-COLOR:#808080;
      SCROLLBAR-SHADOW-COLOR:#FFFFFF;
      SCROLLBAR-3DLIGHT-COLOR:#808080;
      SCROLLBAR-ARROW-COLOR:#808080;
      SCROLLBAR-TRACK-COLOR:#808080;
      SCROLLBAR-DARKSHADOW-COLOR:black}