You need to put your js inside a script tag, you were also missing an end div tag
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Full Width Responsive Image Slider</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script src="http://malsup.github.com/jquery.cycle2.js"></script>
<style type="text/css">
html, body, img {
padding: 0;
margin: 0;
height: 100%;
width: 100%;
}
body {
font-family: "Helvetica Neue", Helvetica, Arial;
}
.container {
height: 100%;
width: 100%;
overflow: hidden;
}
.cycle-slideshow {
height: 100%;
width: 100%;
display: block;
position: relative;
margin: 0 auto;
}
.cycle-prev, .cycle-next {
font-size: 200;
color: #FFF;
display: block;
position: absolute;
top: 50%;
margin-top: -16px;
z-index: 9999;
cursor: pointer;
}
.cycle-prev {
left: 10%;
}
.cycle-next {
right: 10%;
}
.cycle-pager {
width: 100%;
text-align: center;
display: block;
position: absolute;
position: top;
bottom: 20px;
z-index: 9999;
}
.cycle-pager span {
text-indent: 100%;
white-space: nowrap;
;
width: 12px;
height: 12px;
display: inline-block;
border: 1px solid #FFF;
border-radius: 50%;
margin: 0 10px;
cursor: pointer;
}
.cycle-pager .cycle-pager-active {
background: #FFF;
}
#sidebar {
background: #151718;
width: 200px;
height: 100%;
display: block;
position: absolute;
left: -200px;
top: 0px;
transition: left 0.3s linear;
}
#sidebar.visible {
left: 0px;
transition: left 0.3s linear;
}
ul {
margin: 0;
padding: 0;
}
ul li {
list-style: none;
}
ul li a {
background: #1C1E1F;
color: #ccc;
border-bottom: 1px solid #111;
display: block;
width: 180px;
padding: 10px;
text-decoration: none;
}
#sidebar-btn {
display: inline-block;
vertical-align: middle;
width: 20px;
height: 150px;
cursor: pointer;
margin-bottom: 20px;
}
#sidebar-btn span {
height: 1px;
background: #111;
margin-bottom: 5px;
display: block;
}
#sidebar-btn span:nth-child(2) {
width: 75%;
}
#sidebar-btn span:nth-child(3) {
width: 50%;
}
</style>
</head>
<body>
<div id="sidebar">
<ul>
<li><a href="#">Link1</a></li>
<li><a href="#">Link2</a></li>
<li><a href="#">Link3</a></li>
<li><a href="#">Link4</a></li>
</ul>
</div>
<div id="sidebar-btn">
<span></span>
<span></span>
<span></span>
</div>
<!--
<div class="container">
<!--
<!--
</div>
<script type="text/javascript">
$(document).ready(function(){
$('#sidebar-btn').click(function(){
$('#sidebar').addClass('visible');
});
});
</script>
</body>
</html>