How to use JavaScript code with WordPress

Hi guys,

i was creating a WordPress Mobile app but I wanted to remove a menu in the app with JavaScript code but I don’t know how to do that and I’ve checked online but I didn’t find any pls can you help me with that?

I’m trying to remove the circled menu above pls how to do that.

<span class="theme-location-set">
									(Current: <span class="current-menu-location-name-mobile">Mobile</span>)								</span>

That is the menu location. Any help will be glad

Thanks in Advance

The page I need help with: [log in to see the link]