if (navigator.userAgent.indexOf("Mac") != -1)
{
document.write('');
}
else if (navigator.userAgent.indexOf("Win") != -1)
{
if (navigator.userAgent.indexOf("MSIE") != -1)
{
document.write('');
}
else if (parseInt(navigator.appVersion)<5)
{
document.write('');
}
else if (parseInt(navigator.appVersion)>=5)
{
document.write('');
}
}
else
{
document.write('');
}