add a textfield after button click

Hello,

I have a question how I can add a textfield to a form after clicking a button.
Let me explain my situation:
I have a asp page with a lot of form attributes: textfields, checkboxes, lists, hidden fields, etc...
Somewhere in the form is also an add button. When the user clicks on this button, I want to show a new textfield on the screen. The new textfield has to appear on a certain place and not at the bottom of a form. When the user clicks the add button again, another textfield has to appear next under the other textfield.

example:
standard page looks like this:
textfield1
checkbox1
checkbox2
text area

after clicking the button:
textfield1
textfield2 (the new one)
checkbox1
checkbox2
text area

Is this possible?

Thanks for your time!