ok,

ho messo soltanto la cella del mese di gennaio

codice:
<style type="text/css">  
#CellaNome {
	text-align:center;
	background:#D7D7D7;
	font-family:Arial, Helvetica, sans-serif;
	font-size:xx-small;
	width:20px;
} 
#CellaGiorno {
	text-align:center;
	background: #99FFCC;
	font-family:Arial, Helvetica, sans-serif;
	font-size:xx-small;
	border:1px solid #A0D0F8;
} 
#CellaGiornoVuota {
	text-align:center;
	background:#F3F3F3;
	font-family:Arial, Helvetica, sans-serif;
	font-size:xx-small;	
} 
#CellaMese {
	text-align:center;
	background:#F3F3F3;
	font-family:Arial, Helvetica, sans-serif;
	font-size:xx-small;	
} 
</style> 
 
<table style="width: 740px"> 
<tr>
<td></td>
<td id="CellaNome">lu</td>
<td id="CellaNome">ma</td>
<td id="CellaNome">me</td>
<td id="CellaNome">gi</td>
<td id="CellaNome">ve</td>
<td id="CellaNome">sa</td>
<td id="CellaNome">do</td>
<td id="CellaNome">lu</td>
<td id="CellaNome">ma</td>
<td id="CellaNome">me</td>
<td id="CellaNome">gi</td>
<td id="CellaNome">ve</td>
<td id="CellaNome">sa</td>
<td id="CellaNome">do</td>
<td id="CellaNome">lu</td>
<td id="CellaNome">ma</td>
<td id="CellaNome">me</td>
<td id="CellaNome">gi</td>
<td id="CellaNome">ve</td>
<td id="CellaNome">sa</td>
<td id="CellaNome">do</td>
<td id="CellaNome">lu</td>
<td id="CellaNome">ma</td>
<td id="CellaNome">me</td>
<td id="CellaNome">gi</td>
<td id="CellaNome">ve</td>
<td id="CellaNome">sa</td>
<td id="CellaNome">do</td>
<td id="CellaNome">lu</td>
<td id="CellaNome">ma</td>
<td id="CellaNome">me</td>
<td id="CellaNome">gi</td>
<td id="CellaNome">ve</td>
<td id="CellaNome">sa</td>
<td id="CellaNome">do</td>
<td id="CellaNome">lu</td>
<td id="CellaNome">ma</td>		
</tr>
<tr>
<td id="CellaMese">gen</td>		
<td id="CellaGiornoVuota"></td>		
<td id="CellaGiornoVuota"></td>	
<td id="CellaGiornoVuota"></td>	
<td id="CellaGiornoVuota"></td>		
<td id="CellaGiornoVuota"></td>		
<td id="CellaGiornoVuota"></td>		
<td id="CellaGiorno">1</td>		
<td id="CellaGiorno">2</td>		
<td id="CellaGiorno">3</td>		
<td id="CellaGiorno">4</td>		
<td id="CellaGiorno">5</td>		
<td id="CellaGiorno">6</td>		
<td id="CellaGiorno">7</td>		
<td id="CellaGiorno">8</td>		
<td id="CellaGiorno">9</td>	
<td id="CellaGiorno">10</td>		
<td id="CellaGiorno">11</td>	
<td id="CellaGiorno">12</td>		
<td id="CellaGiorno">13</td>	
<td id="CellaGiorno">14</td>		
<td id="CellaGiorno">15</td>		
<td id="CellaGiorno">16</td>		
<td id="CellaGiorno">17</td>		
<td id="CellaGiorno">18</td>		
<td id="CellaGiorno">19</td>		
<td id="CellaGiorno">20</td>		
<td id="CellaGiorno">21</td>		
<td id="CellaGiorno">22</td>		
<td id="CellaGiorno">23</td>		
<td id="CellaGiorno">24</td>		
<td id="CellaGiorno">25</td>		
<td id="CellaGiorno">26</td>		
<td id="CellaGiorno">27</td>		
<td id="CellaGiorno">28</td>		
<td id="CellaGiorno">29</td>		
<td id="CellaGiorno">30</td>		
<td id="CellaGiorno">31</td> 
</tr>
</table>