Question

I am trying to make a nav menu for my website and have been using http://www.onextrapixel.com/2011/06/03/how-to-create-a-horizontal-dropdown-menu-with-html-css-and-jquery/
as a guide. It has worked fine but as soon as I try to add ( id=”coolMenu” ) to the nav tag it stops working.

I took it away from the ul tag and added it to the nav tag and it no longer works. It does not display anything at all. What am in doing wrong?

Thanks.

html code below:

<nav id="coolMenu">
<ul>
    <li><a href="#">Lorem</a></li>
    <li><a href="#">Mauricii</a></li>
    <li> 
        <a href="#">Periher</a>
            <ul class="noJS">
                <li><a href="#">Hellenico</a></li>
                <li><a href="#">Genere</a></li>
                <li><a href="#">Indulgentia</a></li>
            </ul>
    </li>
    <li><a href="#">Tyrio</a></li>
    <li><a href="#">Quicumque</a></li>
</ul>
</nav>

css below:

/* Structure
------------------------------------------*/
#coolMenu,
#coolMenu ul {
    list-style: none;
}
#coolMenu {
    float: left;
}
#coolMenu > li {
    float: left;
}
#coolMenu li a {
    display: block;
    height: 2em;
    line-height: 2em;
    padding: 0 1.5em;
    text-decoration: none;
}
#coolMenu ul {
    position: absolute;
    display: none;
    z-index: 999;
}
#coolMenu ul li a {
    width: 80px;
}
#coolMenu li:hover ul.noJS {
    display: block; 
}


/* Main menu
------------------------------------------*/
#coolMenu {
    font-family: Arial;
    font-size: 12px;
    background: #2f8be8;
}
#coolMenu > li > a {
    color: #fff;
    font-weight: bold;
}
#coolMenu > li:hover > a {
    background: #f09d28;
    color: #000;
}


/* Submenu
------------------------------------------*/
#coolMenu ul {
    background: #f09d28;
}
#coolMenu ul li a {
    color: #000;
}
#coolMenu ul li:hover a {
    background: #ffc97c;
}

Answer 1

The problem is here:

#coolMenu ul {
    position: absolute;
    display: none;
    z-index: 999;
}

Since you put the id on the nav element, the main ul is set to display: none, instead of the submenu uls. If you want to have the id on nav, you will have to change all the css selectors to reflect that.

Or, if you want to target the nav element, why not just give it a new id and leave the rest as is?