html - CSS Styled button won't work? -

granted, styled in css button generator , because i'm lazy , terrible @ css anyway, working before awful attempt @ pasting code!

so, context, have decided add entire code on pastebin link, sorry if it's of hassle. click here.

i can't work, however, if fancy css style shown, button won't work. if button works, it's in hyperlinked version. help?

though i'm newbie myself, far know document.getelementbyid("mybutton").addeventlistener("click", function() has kept in script tag

like this:

<script> document.getelementbyid("mybutton").addeventlistener("click", function() </script> 

check if worked