.nav { margin-left:15; font-family:Arial; font-size:14; color:#FFFFFF; font-weight:bold; text-decoration:none;}

td.btn { cursor:hand; background: url('images/mid.jpg'); background-repeat: repeat-y; background-position: left top
}

td.btn_on { cursor:hand; background: url('images/mid_on.jpg'); background-repeat: repeat-y; background-position: left top
}

td.btn_w { cursor:hand; background: url('images/mid_w_y.jpg'); background-repeat: repeat-y; background-position: left top
}

td.btn_w_on { cursor:hand; background: url('images/mid_w_y_on.jpg'); background-repeat: repeat-y; background-position: left top
}