<option value="N9" > -1	</option>
<option value="N0" selected >  0	</option>
<option value="N1" >  1	</option>
<option value="N2" >  2	</option>
<option value="N3" >  3	</option>
<option value="N4" >  4	</option>
<option value="N5" >  5	</option>
<option value="N6" >  6	</option>
<option value="N7" >  7	</option>
