Additional Navigation bar on click

Question

I have a navigation bar with the section "Contracts" and I was wondering if it were possible, and how would I go about adding an additional navigation bar to expand underneath when this button is tagged, (For example, on the Apple Store site, when you click a product, this adds another bar)

I can provide my entire CSS style sheet if needed! I think this will require JavaScript but I'm trying to keep it as pure CSS for now!

All help is greatly appreciated!

HTML Code: This is the Navigation HTML

<header>
    <div class="title">
        <img src="img/logo2.png"/>
    </div>
    <div class="navbar">
        <ul>
            <li style="float: left"><a href="#home">Home</a></li>
            <li><a href="#contact">Contracts</a></li>
            <li><a href="#about">About Us</a></li>
            <li><a href="#other">Other</a></li>
            <li> <a href="#release">Release Notes</a></li>
            <li> <a target="_blank" href="http://www.phpartnership.com">Pinnacle Health Partnership</a></li>
        </ul>
    </div>
</header>

Creates this

CSS Code: My entire stylesheet

body {
    background-color: #fff;
    margin: 0;
    font-family: Arial;
    color: #333;
}

header {
    background-color: #333;
    position: fixed;
    top: 0;
    width: 100%;
}

.navbar {
    display: block;
    text-align: center;
}

.navbar ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
    overflow: hidden;
}

 .navbar li {
    display: inline-block;
    vertical-align: middle;
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
    box-shadow: 0 0 1px rgba(0, 0, 0, 0);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    -moz-osx-font-smoothing: grayscale;
    position: relative;
    overflow: hidden;
}
.navbar li:before {
    content: "";
    position: absolute;
    z-index: -1;
    left: 50%;
    right: 50%;
    bottom: 0;
    background: white;
    height: 4px;
    -webkit-transition-property: left, right;
    transition-property: left, right;
    -webkit-transition-duration: 0.3s;
    transition-duration: 0.3s;
    -webkit-transition-timing-function: ease-out;
    transition-timing-function: ease-out;
}
.navbar li:hover:before, navbar li:focus:before, .navbar li:active:before {
    left: 0;
    right: 0;
}

.navbar li a {
    padding: 25px;
    display: block;
    height: 100%;
    color: white;
    text-decoration: none;
}

.title {
    height: 80px;
    padding: 2px;
    background-color: #fff;
}

.container {
    margin-top: 150px;
    padding-top: 50px;
}

.home {
    margin-top: 10px;
    text-align: center;
    padding: 40px !important;
}
.wrap {
    width: 100%;
    margin: 0 auto;
}
.left_col {
    float: left;
    width: 50%;
}
.right_col {
    float: right;
   width: 50%;
}
.right_col img {
    width: 80%;
    margin-top: 50px;
    border: 2px solid black;
    border-radius: 5px;
}
.left_col img {
    width: 80%;
    margin-top: 50px;
    border: 2px solid black;
    border-radius: 5px;
}

This is the JavaScript I tried to use to hide and show the div on click

<script>
$(index.php).ready(function(){
    ``$("#contract").click(function(){
            $("<div class="contracts">").toggle();
        });
});
</script>

Answer 1

guess you want smth like this : jsfiddle

first add jQuery to your local environment use this <script type="text/javascript" src="http://code.jquery.com/jquery-latest.min.js"></script>

add it in the head section of your html. for more info check how to install jQuery

added html inside the .navbar

<ul class="aditional">
     <li>test1</li>
      <li>test2</li>
      <li>test3</li>
      <li>test4</li>
</ul>

added css :

.aditional {
position:absolute;
top:100%;
width:100%;
background:#000;
display:none;
}
.aditional li {
color:#fff;
}

added js :

$('.navbar ul li:nth-child(2) a').click(function() {
          $(".aditional").slideToggle()
});

OR if you want a more responsive solution

check this :jsfiddle with target

use data-target on the li a like this

<li><a href="#contact" data-target="contracts">Contracts</a></li>
<li><a href="#about" data-target="aboutus">About Us</a></li>

added html :

 <ul class="aditional contracts">
     <li>test1</li>
     <li>test2</li>
     <li>test3</li>
     <li>test4</li>
 </ul>
 <ul class="aditional aboutus">
      <li>about</li>
      <li>about</li>
      <li>about</li>
      <li>about</li>
 </ul>

jq added :

$('.navbar ul li a').click(function() {
  $(".aditional").slideUp()
  var target = '.' + $(this).data('target');
  $(target).slideDown();
})

OR u can target the href of the li a. simply add this

<li><a href="#contract">Contracts</a></li>
<li><a href="#about">About Us</a></li>
------
<ul class="aditional" id ="contract">
....
<ul class="aditional" id ="about">
....

and js :

$('.navbar ul li a').click(function() {
$(".aditional").slideUp()
var target = $(this).attr('href');
$(target).slideDown();

})

see here jsfiddle

one of these solutions should work for you . let me know