/* aparencia ad tela quando escurece */
.aviso_bg
{
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: black;
  opacity: .5;
  filter: alpha(opacity=50);
  margin: 0;
  padding: 0;
  z-index: 1;
  display: none;
}
/* moldura dos avisos(quando a tela escurece) */
.aviso
{
  z-index: 2;
  width: 350px;
  height: auto;
  background: #b1b1b1 url(../../img/fundo_aviso.gif) repeat-x top center;
  position: absolute;
  top: 50%;
  left: 50%;
  margin-top: -100px;
  margin-left: -175px;
  border: 7px solid #999;
  text-align: center;
  display: none;
  font: 80% verdana, sans-serif;
}
.aviso_b
{
  z-index: 2;
  width: 350px;
  height: auto;
  background: #b1b1b1 url(../../img/fundo_aviso.gif) repeat-x top center;
  position: absolute;
  top: 50%;
  left: 50%;
  margin-top: -100px;
  margin-left: -175px;
  border: 7px solid #999;
  text-align: center;
  font: 80% verdana, sans-serif;
}
.aviso a
{
  text-decoration: none;
  color: black;
  width: 100%;
  display: block;
  }
.aviso a:hover
{
  text-decoration: none;
  color: #333;
}