If I understand you correctly, you can use divs styled e.g.
<div id = "f1" style="display:none">
if you want the div to display.
Or vice-versa if you prefer.
We have created a window of opportunity and it is time to walk through that window. - Conservative MP
All the code given in this post has been tested and is intended to address the question asked.
Unless stated otherwise it is not just a demonstration.