//protected void setNewThreadVisibility()
//{
// if (groupID == 0) // Meeting-Group
// newItem.Visible = false;
// else
// newItem.Visible = true;
//}
protected string evalPicImgString(IReadable forumObj, Person user)
{
if (forumObj.isReader(user)) // read
return "";
else if (forumObj.isNew(user)) // new & unread
return "<img src='pic/GelberStern.png' />";
else // only unread
return "<img src='pic/GruenerStern.png' />";
}