.icon-down-dir { *zoom: expression( this.runtimeStyle['zoom'] = '1', this.innerHTML = ' '); }
.icon-up-dir { *zoom: expression( this.runtimeStyle['zoom'] = '1', this.innerHTML = ' '); }
.icon-down-open { *zoom: expression( this.runtimeStyle['zoom'] = '1', this.innerHTML = ' '); }
.icon-up-open { *zoom: expression( this.runtimeStyle['zoom'] = '1', this.innerHTML = ' '); }