[1] 例:

.smiley-happy {
  width: -o-skin;
  height: -o-skin;
  background-image: -o-skin("Smiley Happy");
}

(名無しさん [sage])

[2] Opera&M2_exCSS @Temporary-Depot http://www.pandora.nu/tempo-depot/opera/m2_css.html#ex_css_smiley (名無しさん [sage])