function rollover(obj) {
    obj.src = Left(obj.src, obj.src.length - 5) + '1.gif';
}

function rollout(obj) {
    obj.src = Left(obj.src, obj.src.length - 5) + '0.gif';
}

function Left(str, n) {
    if (n <= 0)
        return "";
    else if (n > String(str).length)
        return str;
    else
        return String(str).substring(0, n);
}

function Right(str, n) {
    if (n <= 0)
        return "";
    else if (n > String(str).length)
        return str;
    else {
        var iLen = String(str).length;
        return String(str).substring(iLen, iLen - n);
    }
}

function ShowWindow(urlpage) {
    newWin = window.open(urlpage, 'newwindow', config = 'height=800, width=612, toolbar=no, menubar=no,scrollbars=yes, resizable=no, location=no, directories=no, status=no');
    newWin.focus();
    return false;
}

function openWindow(mypage, myname, w, h, scroll) {
    var winl = (screen.width - w) / 2;
    var wint = (screen.height - h) / 2;
    winprops = 'height=' + h + ',width=' + w + ',top=' + wint + ',left=' + winl + ',scrollbars=' + scroll + ''
    win = window.open(mypage, myname, winprops)
    if (parseInt(navigator.appVersion) >= 4) {
        win.window.focus();
    }
}