register form about container box and button

hi everyone~ I am looking for solution about how to use hide and show elements to do register form. I am using container box and button because I want the feeling likes click the button then will come out likes pop-up. thanks alot, I am newbie

You can see how hide and show work in these examples:

Hide & Show Elements
Hide and Show an Image

You also might be able to use collapse and expand. See this example:

Collapse Elements