CSS and J-Query Help.....(New Poster)

Hi all,

I have just started to learn J-Query and I'm trying to implement a simple click event into my webpage, which is when you click a button it will open the mobile-nav.

This button works when I select the header for example but wont open the mobile-nav?

I will upload the index file p.s I'm copying the DICE homepage just for learning purposes as I know I'm using copyrighted media .

I think it could be to do with that Im hiding the mobile-nav in my CSS so the J-query cant toogle/show...

CSS and J-Query Help.....(New Poster)

Poster :
Tom Noble