A { text-decoration:none; color:#000000}

  .A1:link{text-decoration:none;color:#000000}
  .A1:hover{text-decoration:underline;color:#0000ff;font-weight:600}
  .A1:visited{text-decoration:none;}
 
  .A2:link{text-decoration:none;color:#000000}
  .A2:hover{text-decoration:none;color:#ff0000;}
  .A2:visited{text-decoration:none; }

  .A3:link{text-decoration:underline;color:#ff0000}
  .A3:hover{text-decoration:underline;color:#ff0000;}
  .A3:visited{text-decoration:underline; }

  .A4:link{text-decoration:none;color:#000000}
  .A4:hover{text-decoration:none;color:#0000ff; background-color:#ffffcc; font-weight:600}
  .A4:visited{text-decoration:none; color:#880095 }


 .celdaboton {
                           border-top:solid 2px #fdfd99;
                           border-left:solid 2px #ffff99;
                           border-bottom:solid 2px #c99030;
                           border-right:solid 2px #da9030;
                           background-color:#fed152;
                           padding=0;
                          }
.celdaboton2 {
                           border-top:solid 2px #dafcf3;
                           border-left:solid 2px #dafcf3;
                           border-bottom:solid 2px #86b8c0;
                           border-right:solid 2px #86b8c0;
                           background-color:#b9eaf1;
                           padding=0;
                          }
.celdaboton3 {
                           border-top:solid 2px #f9f2e7;
                           border-left:solid 2px #f9f2e7;
                           border-bottom:solid 2px #a3c082;
                           border-right:solid 2px #a3c082;
                           background-color:#e7f0c5;
                           padding=0;
                          }