.semitransparente {
padding:3px;
margin:20px;
  /* Mozilla ignores crazy MS image filters, so it will skip the following */
    filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true, sizingMethod=scale src='http://www.lapicazena.com/semitransparente.png');
}
/* IE ignores styles with [attributes], so it will skip the following. */
.semitransparente[class] {
  background-image:url(http://www.lapicazena.com/semitransparente.png);
}

.semitransparente2 {
  /* Mozilla ignores crazy MS image filters, so it will skip the following */
    filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true, sizingMethod=scale src='http://www.zonasrurales.com/web/portada/semitransparente2.png');
}
/* IE ignores styles with [attributes], so it will skip the following. */
.semitransparente2[class] {
  background-image:url(http://www.zonasrurales.com/web/portada/semitransparente2.png);
}