I have a website that is made with Twitter Bootstrap. On a large screen the navbar is looking nice as it should be but if you see the same navbar on a cellphone the navbar won\'
you need to include the responsive css file of twitter bootstrap, and also use the bootstrap-collapse.js.
Note the info on http://twitter.github.io/bootstrap/components.html#navbar at 'responsive navbar':
Heads up! The responsive navbar requires the collapse plugin and responsive Bootstrap CSS file.
Quicklinks: