Come validare ButtonRadio?

[luglio1975]

<h2 class="gironi">Gironi</h2>
<table class="girone">
<FORM action="selectForm">
<tr>
<td>
<INPUT type="radio" name="leagueRadio" value="gironeE.txt" CHECKED onClick="document.TeamStats.setLeaguefile(this.val ue)" /> Girone E
</td>

<td>
<INPUT type="radio" name="leagueRadio" value="data/args/gironeG.txt" onClick="document.TeamStats.setLeaguefile(this.val ue)" /> Girone G
</td>
</tr>
</form>
</table>

Come posso validare questo coduice? Non ho trovato niente in giro...