Javascript-interface for repeat elements function

Adding new blank answer requires page-reloading. It's not comfortable. Using advanced opportunities of YUI library we can realize adding blank choices without it. Button "Blanks for 3 more Choices" will be changed to "Add blank choise".http://imglink.ru/pictures/21-09-10/f85258328f02d65164e6a15644e5d8a9.jpg

Pushing button Add blank choise will add one empty answer to the page without reloading.