a.sm2_button {
 position:relative;
 display:inline-block; /* If you worry about old browser bugs, Firefox 2 might not like this and may need -moz-inline-box instead. :D */
 width:18px;
 height:18px;
 text-indent:-9999px; /* don't show link text */
 overflow:hidden; /* don't draw inner link text */
 vertical-align:middle;
 /* and, a bit of round-ness for the cool browsers. */
 border-radius:6px;
 margin-top:-1px; /* vertical align tweak */
 /* safari 3.1+ fun (/W3 working draft extension, TBD.) */
 -webkit-transition-property: hover;
 -webkit-transition: all 0.2s ease-in-out;
 -moz-transition: all 0.2s ease-in-out 0s; /* firefox 4 (couldn't sort out -moz-transform vs. MozTransform, so, "all" for now) */
 -o-transition-property: background-color; /* opera 10.5 */
 -o-transition-duration: 0.15s;
 /* weird IE 6/7 display fixes, and/or I'm doing it wrong */
 *text-indent:0px;
 *line-height:99em;
 *vertical-align: top;
}

a.sm2_button:focus {
 outline:none; /* maybe evil, but don't show the slight border outline on focus. */
}

a.sm2_button,
a.sm2_button.sm2_paused:hover {
 background-image:url('../img/sound_stop.png');
 /* where possible, use data: and skip the HTTP request. Fancy-pants. Would use short-hand background: for above, but IE 8 doesn't override background-image. */
 background-image:url('data:image/png;base64,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');
 *background-image:url('../img/sound_stop.gif'); /* IE 6+7 don't do DATA: URIs */
 background-repeat:no-repeat;
 background-position:0px 50%;
 *background-position:5px 4px; /* IE 6 again */
}

a.sm2_button:hover,
a.sm2_button.sm2_playing,
a.sm2_button.sm2_playing:hover {
}

a.sm2_button.sm2_playing,
a.sm2_button.sm2_playing:hover {
 background-image:url('../img/sound_play.png');
 background-image:url('data:image/png;base64,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');
 *background-image:url('../img/sound_play.gif'); /* IE 6+7 don't do DATA: URIs */
}

a.sm2_button.sm2_paused,
a.sm2_button.sm2_paused:hover {
 background-image:url('../img/sound_pause.png');
 background-image:url('data:image/png;base64,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');
 *background-image:url('../img/sound_pause.gif'); /* IE 6+7 don't do DATA: URIs */
}

span.no_audio{
 background-image:url('../img/sound_no.png');
 background-image:url('data:image/png;base64,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');
 *background-image:url('../img/sound_no.gif'); /* IE 6+7 don't do DATA: URIs */
 width: 18px;
 height: 18px;
 background-repeat:no-repeat;
 background-position: 0 50%;
 display: inline-block;
 vertical-align: middle;
}