Aqui les envio como puse el code
Código HTML:
<body>
<td width="5"><form id="form1" name="form1" method="post" action="">
<table width="469" cellpadding="0" cellspacing="0">
<col width="47" />
<col width="270" />
<col width="27" />
<col width="66" />
<col width="80" />
<tr height="22">
<td height="22" width="47">COD</td>
<td width="322"><div align="center" class="Estilo3">SERVICIO DE FESTEJO</div></td>
<td width="58"> </td>
<td width="58"> </td>
</tr>
<tr height="17">
<td height="17"></td>
<td><div align="center">Descripciòn</div></td>
<td>Cantidad</td>
<td></td>
</tr>
<tr height="17">
<td height="17">519</td>
<td class="Estilo2">Sillas C/Faldon y Lazo</td>
<td><label>
<div align="center">
<input name="textfield" type="text" id="textfield" value="" size="4" />
</div>
<div align="center"></div>
<div align="center"></div></td>
<td><label>
<input name="checkbox2" type="checkbox" id="checkbox2" value="520" onchange="document.form1.textfield.disabled=!this.checked"/>
</label></td>
</tr>
<tr height="17">
<td height="17">520</td>
<td class="Estilo2">Mesa C/Mantel y Blonda</td>
<td><label>
<div align="center">
<input name="textfield2" type="text" id="textfield2" size="4" maxlength="4" />
</div>
<div align="center"></div>
<div align="center"></div>
</label></td>
<td><input name="checkbox" type="checkbox" id="checkbox" value="520" onchange="document.form1.textfield2.disabled=!this.checked"/></td>
</tr>
</table>
</form>
</td>
<td class="clsNormal10" value="2"> </td>
</body>