I'm building a registration page and I'm looking for a script that will allow me to show and hide the different Registration page times example Single or Couple all have a unique registration page so if the user clicks the Single link the Form for a single person is displayed before for them to fill out and submit and if they click Couple the other form is displayed.

also i dont know which method would be best loading for a single and couple.html file or having both forms on the page?
thanks is advance.