validation plugin, validating by parts

validation plugin, validating by parts

I'm using the validation plugin from this website: http://bassistance.de/jquery-plugins/jquery-plugin-validation/
 
The validation works good, but i have some trouble when i want to partially check for validations. I have the following markup:
 
<form id="myform">
 <fieldset>
  <legend>Page 1</legend>
  Name: <input name="name" class="required" />
 </fieldset>
 <button id="page1"> GO TO NEXT PAGE </button>
 
 <fieldset>
  <legend>Page 2</legend>
  Something else: <input name="something_else" class="required" />
 </fieldset>
 <input type="text" name="submit" value="Submit" />
</form>
 
What i want is, when i click on the first 'button', that it only checks the input fields in the first fieldset.
Then when i goto the second page i want it to only check the fields in the 2nd fieldset.
 
The plugin comes with a few demos and one of them is actually doing something like this, but i can't really see how its exactly done... Can someone please help me out with this..??