[php + jquery] evento on click

[84morena]

Form con campi

<td class="fielddescrNoSize" width="30%">* Password
</td><td class="field" width="70%">
<input value="" maxlength="48" size="25" id="password" name="password" type="password" class="input w300 required">
</td>
</tr>
<tr>
<td class="fielddescrNoSize">* Conferma password</td><td class="field">
<input name="password2" id="password2" maxlength="48" size="25" type="password" class="input w300 required" />
</td>
<td style="width: 16px"><a onClick="turnDisplay('help_email'); return false;" href="#"><img src="modifico_profilo_files/help2.png"></a></td>
</tr> 

jquery:

<script language="javascript">
$(document).ready(function() {
    $("#frm_profilo").validate({
        rules: 
        {
            password2: {
                equalTo: '#password'
            }
        },
        messages: {
            password2: {
                equalTo: "Le 2 password non coincidono",
            }
        }
    });
});
</script> 

salve volevo chiedervi come mettere l'evento onclick , perchè se tolgo lo script di jquery funziona
saluti