LebCit on "JavaScript loading but not working !"

Hello everyone,

After three days, war coding, to make a js file run, i have only this great place to ask, hoping that i'll find someone with good experience in js into WP to tell me what's wrong and how should i proceed to make it work.

First things first, i'm trying to implement a menu in a personal parent theme (i've tried to implement it for testing in underscores and in Twenty Thirteen).

1- After seting up the markup of my menu in a separate php file in the root of the theme folder (e.g. nav-top.php)

<ul id="gn-menu" class="gn-menu-main">
    <li class="gn-trigger">
        <a class="gn-icon gn-icon-menu"><span>Menu</span></a>
        <nav class="gn-menu-wrapper">
			<div class="gn-scroller">
				<ul class="gn-menu">
					<li class="gn-search-item">
						<input placeholder="Search" type="search" class="gn-search">
						<a class="gn-icon gn-icon-search"><span><?php get_search_form(); ?></span></a>
					</li>
					<li>
						<a class="gn-icon gn-icon-download">Downloads</a>
						<ul class="gn-submenu">
							<li><a class="gn-icon gn-icon-illustrator">Vector Illustrations</a></li>
							<li><a class="gn-icon gn-icon-photoshop">Photoshop files</a></li>
						</ul>
					</li>
				</ul>
			</div><!-- /gn-scroller -->
        </nav>
    </li>
    <li><a href="http://tympanus.net/codrops">Codrops</a></li>
    <li><!-- ... --></li>
    <!-- ... -->
</ul>

I left the markup like this for testing. Working fine under an html file !

2- I tried just to wp_enqueue_script the two necessary files for the menu and wp_enqueue_style in fuctions.php, without registering in a function !
Then i used <?php get_template_part('nav', 'top'); ?> at the top of the header.php before the title of the site.
The css worked just fine, i could see the menu bar, but the js files where not working since the sidebar panel of the menu was not opening.

3- I tried to register and enqueue the scripts and the style in a function in functions.php, but i had the same result as before, the css was here and the js files where not working.

4- I tried to integrate the navigation directly in header.php after
a- just enqueue the scripts and the style
b- register and enqueue the scripts and the style in a function
BUT, the result was always the same css working, js not working.

In the title i type "JavaScript loading..." i can tell because i saw the code source of my page and they where here like the style.

Oh, just for more info, when i enqueue or register/enqueue the js files, i've tried to put them in the footer than in the header (true, false), than i tried to call jquery in the array( array('jquery') ),
nothing seems to work !

Finally, why three days for an hour of testing ?
Hell, because i've tried a lot of menu and the result was the same for all of them : css working, js loading but not working !
And i made a lot lot lot of reading :)

So, the problem is in my experience with js in WP, it's my fault :)
I hope that someone will help me to finally pass this step and go further in js into WP.

Thanks a lot in advance for your help :)