I am trying to create a page some as this page https://register.akirawavelength.com/registration.aspx
Now I found a problem, in this old page when you check the check box, there will show up another section with question and when you uncheck the check box these section just disappear.
Now I am trying to make a same page as this page, but I am unable to make that function work, please let me know how can I create that. Thanks.