JavaScript doesn't work

Question

I use the editor Bluefish, the browser Firefox. The HTML is version 5. But still many pieces of code just won't work!

Answer 1

You might have your JavaScript disabled in your browser. Here's steps to enable JavaScript on Firefox:
Tools>options>content>enabled JavaScript>ok
or just google 'enable JavaScript on ___ browser'

Answer 2

Maybe the problem is in your code.
In wich element did you use script tag