The idea is that you would have a validation applied to the select list for required. Next you would put in the response validation of hide/show and select the select list as the trigger and the field you want to hide or show as the target. You would then go about applying the rest of the client side validations like normal. I'm including a example page for this type of client validation. It uses a checkbox to hide or show the next part of the form.
As for putting the form on multiple pages you can do this by having the first form page post to the next. Then on the second form page you would add in hidden form elements for each field on the first form. You would then go to the bindings panel to set the value of these hidden form elements to the posted values from the first form. This way when you post this second form it will contain all of the info from the first one as well.
however when i try to recreate this i click on client validation but there is no option for show hide etc? where do i go?
i want to hide part of my form, would i click on the fieldset? or how would i hide part of it until they check the box?
thanks again eric for your help