7 Replies
the error is self-explanatory
if takes an expression between ()
you have an if without the expression
so, document is unexpected there
remove the if and start using braces
also, Checked doesn't exist
it MUST be checked
also also document.getElementById takes an id, but you're put a css selector - remove the #
also also also, store document.getElementById in a variableDEAR LORD, THAT IS HORRIBLE
you're trying to learn javascript from bad code from 2013
learn from there
in your code you used
else if in the page you linked they used else
with else if you need to add condition inside () just like in if