function highlightOn(item) {
    if (document.getElementById(item)) {
        document.getElementById(item).style.background='url(/skin/images/back.png) no-repeat left -37px';
    }
    return true;
}
function highlightOff(item) {
    if (document.getElementById(item)) {
        document.getElementById(item).style.background='url(/skin/images/back.png) no-repeat left top';
    }
    return true;
}