.halfkeys {position: absolute;z-index: 2; visibility: hidden;}
.halfkeys .button_edge {background-color: #0f0;}
.num .button_edge {background-color: #ffd;}
.utton_edge {border: outset 3px #ddd; float: left; cursor: pointer;}
.utton {width: 24px; height: 24px; text-align: center;}
.button_edge {border: solid 1px #aaa; margin: 2px; float: left; cursor: pointer;}
.button {width: 24px; height: 24px; text-align: center;}
.row {clear: both;}
.small {font-size: 9px;}
.blank {float: left; width: 30px; height: 30px;}