Opacity hack
1.0
CSS



     {
    filter: alpha(opacity=); /* MSIE/PC */
    -moz-opacity: ; /* Mozilla 1.6 and older */
    opacity: ;
    }


or

selector {
  filter: alpha(opacity=60); /* MSIE/PC */
  -moz-opacity: 0.6; /* Mozilla 1.6 and older */
  opacity: 0.6;
}