[class^="po-"], [class*=" po-"] {
  font-family: 'portus';
  font-style: normal;
  font-weight: normal;
 
  /* fix buttons height */
  line-height: 1em;
 
  /* you can be more comfortable with increased icons size */
  /* font-size: 120%; */
}
 
.po-portus { *zoom: expression( this.runtimeStyle['zoom'] = '1', this.innerHTML = ' '); }
.po-clock { *zoom: expression( this.runtimeStyle['zoom'] = '1', this.innerHTML = ' '); }
.po-head { *zoom: expression( this.runtimeStyle['zoom'] = '1', this.innerHTML = ' '); }