Buongiorno,
non riesco a ridimensionare la larghezza delle colonne nella tabella che vi posto.

Avrei la necessità di allargare la colonna "intervento" e ridurre la larghezza delle colonne
Importo| Iva | Calcola | Totale

codice:
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Documento senza titolo</title>
</head>


<body>
<legend>Interventi</legend>
<table width="615" border="1" cellpadding="3" cellspacing="1" bordercolor="#FFCC00" style="background-color:#FFFFCC">
        <td>Intervento</td>
      	<td>Importo</td>
        <td>Iva</td>
        <td>Calcola</td>
        <td>Totale</td>
        </tr>
      <tr>
        </tr>
      <tr>
        <td><input name="int1" id="int1"></td>
        <td><input name="imp_1" id="imp_1"></td>
        <td><input name="iva_1" id="iva_1"></td>
        <td><input type="button" value="Calcola" onClick="javascript:sum();"></td>
        <td><input name="tot_1" id="tot_1"></td>
        </tr>
      <tr>
        <td><input name="int2" id="int2"></td>
        <td><input name="imp_2" id="imp_2"></td>
        <td><input name="iva_2" id="iva_2"></td>
        <td><input name="tot_2" id="tot_2"></td>
        </tr>
        
        <tr>
        <td><input name="int3" id="int3"></td>
        <td><input name="imp_3" id="imp_3"></td>
        <td><input name="iva_3" id="iva_3"></td>
        <td><input name="tot_3" id="tot_3"></td>
        </tr>
        
        <tr>
        <td><input name="int4" id="int4"></td>
        <td><input name="imp_4" id="imp_4"></td>
        <td><input name="iva_4" id="iva_4"></td>
        <td><input name="tot_4" id="tot_4"></td>
        </tr>
        
        <tr>
        <td><input name="int5" id="int5"></td>
        <td><input name="imp_5" id="imp_5"></td>
        <td><input name="iva_5" id="iva_5"></td>
        <td><input name="tot_5" id="tot_5"></td>
        </tr> 
        
        <tr>
        <td><input name="int6" id="int6"></td>
        <td><input name="imp_6" id="imp_6"></td>
        <td><input name="iva_6" id="iva_6"></td>
        <td><input name="tot_6" id="tot_6"></td>
        </tr>
        
        <tr>
        <td><input name="int7" id="int7"></td>
        <td><input name="imp_7" id="imp_7"></td>
        <td><input name="iva_7" id="iva_7"></td>
        <td><input name="tot_7" id="tot_7"></td>
        </tr>    
        
        <tr>
        <td><input name="int8" id="int8"></td>
        <td><input name="imp_8" id="imp_8"></td>
        <td><input name="iva_8" id="iva_8"></td>
        <td><input name="tot_8" id="tot_8"></td>
        </tr>
        
        <tr>
        <td><input name="int9" id="int9"></td>
        <td><input name="imp_9" id="imp_9"></td>
        <td><input name="iva_9" id="iva_9"></td>
        <td><input name="tot_9" id="tot_9"></td>
        </tr> 
        
        <tr>
        <td><input name="int10" id="int10"></td>
        <td><input name="imp_10" id="imp_10"></td>
        <td><input name="iva_10" id="iva_10"></td>
        <td><input name="tot_10" id="tot_10"></td>
        </tr>
                 
        </table>
</body>
</html>
come posso risolvere ?

Grazie