Tengo els iguiente fomrulario
Código HTML:
<form action="jugar2.php" method="post" name="form1" target="ji" id="form1">
<table width="116" border="1" align="center" class="Estilo2">
<tr>
<td width="54">Noonimal</td>
<td width="130">Posicion</td>
</tr>
<tr>
<td>1</td>
<td><label>
<select name="1" id="1">
<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>
</label></td>
</tr>
<tr>
<td>2</td>
<td><select name="2" id="2">
<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>3</td>
<td><select name="3" id="3">
<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>4</td>
<td><select name="4" id="4">
<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>5</td>
<td><select name="5" id="5">
<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>6</td>
<td><select name="6" id="6">
<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>7</td>
<td><select name="7" id="7">
<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> 8</td>
<td><select name="8" id="8">
<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>
</table>
<br />
<label>
<input type="submit" name="button" id="button" value="¡ME ARRIESGO!" />
</label>
</form> Como podria hacer para verificar en PHP que el campo uno,no sea igual al 2,3,4,5,6,7,8 , que el dos no sea igual al 1,3,4,5,6,7,8 , etc, etc ,etc-
Gracias