jQuery Stepy
Exemplo:
$('#form').stepy();
<form id="custom">
<fieldset title="Title">
<legend>description</legend>
<!-- input fields -->
</fieldset>
<fieldset title="Title">
<legend>description</legend>
<!-- input fields -->
</fieldset>
<input type="submit" class="finish"/>
</form>
Demos: wbotelhos.com/stepy
Contribuições: github.com/wbotelhos/stepy
