.nihilo .cbtreeCheckBox {background-image: url("images/spriteCheckbox.gif"); background-repeat: no-repeat; width: 16px; height: 16px; margin: 0; padding: 0;}.nihilo .cbtreeCheckBox {background-position: -16px;}.nihilo .cbtreeCheckBoxChecked {background-position: 0px;}.nihilo .cbtreeCheckBoxMixed {background-position: -32px;}.nihilo .cbtreeCheckBoxDisabled {background-position: -64px;}.nihilo .cbtreeCheckBoxCheckedDisabled {background-position: -48px;}.nihilo .cbtreeCheckBoxMixedDisabled {background-position: -80px;}.nihilo .cbtreeCheckBoxReadOnly {background-position: -64px;}.nihilo .cbtreeCheckBoxCheckedReadOnly {background-position: -48px;}.nihilo .cbtreeCheckBoxMixedReadOnly {background-position: -80px;}.nihilo .cbtreeCheckBoxHover {background-position: -112px;}.nihilo .cbtreeCheckBoxCheckedHover {background-position: -96px;}.nihilo .cbtreeCheckBoxMixedHover {background-position: -128px;}