Quedó asi:
Código PHP:
<html>
<body>
<form id="form1" name="form1" method="post" action="apostar.php" onSubmit="return confirma_apuesta()" >
<table><tr><td><table>
<tr><td colspan="7">Nº </td></tr>
<tr>
<td><select name="posic1" id="posic1">
<option value="0" selected="selected">0</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
</select></td>
<td><select name="posic2" id="posic2">
<option value="0" selected="selected">0</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
</select></td>
<td><select name="posic3" id="posic3">
<option value="0" selected="selected">0</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
</select><td>
<td><select name="posic4" id="posic4">
<option value="0" selected="selected">0</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
</select></td>
<td><select name="posic5" id="posic5">
<option value="0" selected="selected">0</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
</select></td>
<td><select name="posic6" id="posic6">
<option value="0" selected="selected">0</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
</select></td>
<td><select name="posic7" id="posic7">
<option value="0" selected="selected">0</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
</select></td></tr>
<tr><td colspan="7">Boletos</td></tr>
<tr>
<td><select name="boleto1" id="boleto1" onchange="actualiza_apuesta();">
<option value="0" selected="selected">0</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
<option value="7">7</option>
<option value="8">8</option>
</select>
<input id="fijo" name="fijo" type="hidden" value="20.00"></td>
<td><select name="boleto2" id="boleto2" onchange="actualiza_apuesta();">
<option value="0" selected="selected">0</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
<option value="7">7</option>
<option value="8">8</option>
</select>
</td>
<td><select name="boleto3" id="boleto3" onchange="actualiza_apuesta();">
<option value="0" selected="selected">0</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
<option value="7">7</option>
<option value="8">8</option>
</select>
</td>
<td><select name="boleto4" id="boleto4" onchange="actualiza_apuesta();">
<option value="0" selected="selected">0</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
<option value="7">7</option>
<option value="8">8</option>
</select>
</td>
<td><select name="boleto5" id="boleto5" onchange="actualiza_apuesta();">
<option value="0" selected="selected">0</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
<option value="7">7</option>
<option value="8">8</option>
</select>
5</td>
<td><select name="boleto6" id="boleto6" onchange="actualiza_apuesta();">
<option value="0" selected="selected">0</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
<option value="7">7</option>
<option value="8">8</optio
</select>
</td>
<td><select name="boleto7" id="boleto7" onchange="actualiza_apuesta();">
<option value="0" selected="selected">0</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
<option value="7">7</option>
<option value="8">8</option>
</select>
</td></tr>
<tr><td colspan="7">
<input name="submit" type="submit" id="apostar" value="Apostar"/>
<input type="button" name="Submit2" value="Regresar" /></td></tr>
</table></td></tr></table></form>
</body>
</html>