hola, 
tengo hecho esto
<ul>
<li id="foli1" 		class="     ">
	<label class="desc" id="title1" for="Field1">
		Nombre y Apellidos
			</label>
	<span>
		<input id="Field1" name="Field1" type="text" class="field text fn" value=""	size="8" tabindex="1"/>
		<label for="Field1">Nombre</label>
	</span>
	<span>
		<input id="Field2" name="Field2" type="text" class="field text ln" value="" size="14" tabindex="2"/>
		<label for="Field2">Apellido</label>
	</span>
	</li>
<li id="foli10"	class="phone">
	<label class="desc" id="title10" for="Field10">
		Número de teléfono
			</label>
	<span>
		<input id="Field10"	name="Field10" type="text" class="field text" value="" size="3" maxlength="3" tabindex="3"/>
		<label for="Field10">###</label>
	</span>
	<span class="symbol">-</span>
	<span>
		<input id="Field10-1" name="Field10-1" type="text" class="field text" value="" size="3" maxlength="3" tabindex="4"/>
		<label for="Field10-1">###</label>
	</span>
	<span class="symbol">-</span>
	<span>
	 	<input id="Field10-2" name="Field10-2" type="text" class="field text" value="" size="4" maxlength="4" tabindex="5"/>
		<label for="Field10-2">####</label>
	</span>
	</li>
<li id="foli9" class="date">
	<label class="desc" id="title9" for="Field9">
		Fecha
			</label>
	<span>
		<input id="Field9-1" name="Field9-1" type="text" class="field text" value="" size="2" maxlength="2" tabindex="6"/>
		<label for="Field9-1">mes</label>
	</span> 
	<span class="symbol">/</span>
	<span>
		<input id="Field9-2" name="Field9-2" type="text" class="field text" value="" size="2" maxlength="2" tabindex="7"/>
		<label for="Field9-2">día</label>
	</span>
	<span class="symbol">/</span>
	<span>
	 	<input id="Field9" name="Field9" type="text" class="field text" value="" size="4" maxlength="4"	tabindex="8"/>
		<label for="Field9">año</label>
	</span>
	<span id="cal9">
		<img id="pick9" class="datepicker" src="images/calendar.png" alt="Fecha." />
	</span>
	</li>
<li id="foli12" class="     ">
	<label class="desc" id="title12" for="Field12">
		Email
			</label>
	<div>
		<input id="Field12" name="Field12"	type="text" class="field text medium" value=""  maxlength="255"  tabindex="9"/> 
	</div>
	</li>
 
 
 
<li id="foli11" 		class="     ">
	<label class="desc" id="title11" for="Field11_0">
		Actividades
			</label>
	<div>
	<input id="radioDefault_11" name="Field11" type="hidden" value="" />
		<span>
	<input id="Field11_0" 		name="Field11" 		type="radio" 		class="field radio" 		value="escalada" 		tabindex="10" 						 checked="checked" 						/>
	<label class="choice" for="Field11_0" 		>
		escalada</label>
		</span>
		<span>
	<input id="Field11_1" 		name="Field11" 		type="radio" 		class="field radio" 		value="espeleología" 		tabindex="11" 								/>
	<label class="choice" for="Field11_1" 		>
		espeleología</label>
		</span>
		<span>
	<input id="Field11_2" 		name="Field11" 		type="radio" 		class="field radio" 		value="tirolina" 		tabindex="12" 								/>
	<label class="choice" for="Field11_2" 		>
		tirolina</label>
		</span>
		<span>
	<input id="Field11_3" 		name="Field11" 		type="radio" 		class="field radio" 		value="rápel" 		tabindex="13" 								/>
	<label class="choice" for="Field11_3" 		>
		rápel</label>
		</span>
		<span>
	<input id="Field11_4" 		name="Field11" 		type="radio" 		class="field radio" 		value="barranquismo" 		tabindex="14" 								/>
	<label class="choice" for="Field11_4" 		>
		barranquismo</label>
		</span>
		<span>
	<input id="Field11_5" 		name="Field11" 		type="radio" 		class="field radio" 		value="senderismo" 		tabindex="15" 								/>
	<label class="choice" for="Field11_5" 		>
		senderismo</label>
		</span>
		<span>
	<input id="Field11_6" 		name="Field11" 		type="radio" 		class="field radio" 		value="4x4" 		tabindex="16" 								/>
	<label class="choice" for="Field11_6" 		>
		4x4</label>
		</span>
		<span>
	<input id="Field11_7" 		name="Field11" 		type="radio" 		class="field radio" 		value="multiaventura" 		tabindex="17" 								/>
	<label class="choice" for="Field11_7" 		>
		multiaventura</label>
		</span>
		<span>
	<input id="Field11_8" 		name="Field11" 		type="radio" 		class="field radio" 		value="otros" 		tabindex="18" 								/>
	<label class="choice" for="Field11_8" 		>
		otros</label>
		</span>
		</div>
	</li>
 
 
 
	<li class="buttons ">
		<div>
			<input type="hidden" name="currentPage" id="currentPage" value="dB5YAYUJLThQ1vViLqkRtO8PC6nWmLuPsz2BRQNT4gw  =" action="[email protected]" />
			<input id="saveForm" name="saveForm" class="btTxt submit" type="submit" value="Submit" onmousedown="doSubmitEvents();" />
	   </div>
	</li>
 
	<li style="display:none">
		<label for="comment">Do Not Fill This Out</label>
		<textarea name="comment" id="comment" rows="1" cols="1"></textarea>
		<input type="hidden" id="idstamp" name="idstamp" value="" />
		<input type="hidden" id="stats" name="stats" value="" />
				<input type="hidden" id="clickOrEnter" name="clickOrEnter" value="" />
	</li>
</ul>
</form>
 
creo que me faltaría validarlo... cómo se hace? 
   
 



