drop down play

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  
 <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
   <script src="https://labratrevenge.com/d3-tip/javascripts/d3.tip.v0.6.3.js"></script>
	<link rel="stylesheet" type="text/css" href="https://fonts.googleapis.com/css?family=Roboto+Slab:400,100,300,700">
	<link rel="stylesheet" type="text/css" href="https://fonts.googleapis.com/css?family=Roboto:400,100,100italic,300,300italic,400italic,500,500italic,700,700italic,900,900italic">
  <link rel="stylesheet" href="//code.jquery.com/ui/1.11.4/themes/smoothness/jquery-ui.css">
  <script src="//code.jquery.com/jquery-1.10.2.js"></script>
  <script src="//code.jquery.com/ui/1.11.4/jquery-ui.js"></script>
  
  
<style>
  
.dropbtn {
    background-color: #4CAF50;
    color: white;
    padding: 16px;
    font-size: 16px;
    border: none;
    cursor: pointer;
}

.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: #f9f9f9;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
}

.dropdown-content a {
    color: black;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
}

.dropdown-content a:hover {background-color: #f1f1f1}

.dropdown:hover .dropdown-content {
    display: block;
}

.dropdown:hover .dropbtn {
    background-color: #3e8e41;
}

.d3-tip {
  line-height: 1;
  font-weight: bold;
  padding: 12px;
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  border-radius: 2px;
}

.d3-tip:after {
  box-sizing: border-box;
  display: inline;
  font-size: 10px;
  width: 100%;
  line-height: 1;
  color: rgba(0, 0, 0, 0.8);
  content: "\25BC";
  position: absolute;
  text-align: center;
}   
  
  .d3-tip.n:after {
  margin: -1px 0 0 0;
  top: 100%;
  left: 0;
}
  </style>

</head>

<body>    
  <div class="dropdown">
  <button class="dropbtn">Dropdown</button>
  <div class="dropdown-content">
    <a href="#">Blue</a>
    <a href="#">Green</a>
  </div>
</div>
  
<script>
$( "div" ).click(function() {
  $( "Blue" ).toggleClass( "blue", 1000);

});
</script>

Modified http://labratrevenge.com/d3-tip/javascripts/d3.tip.v0.6.3.js to a secure url

https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js

https://labratrevenge.com/d3-tip/javascripts/d3.tip.v0.6.3.js

https://code.jquery.com/jquery-1.10.2.js

https://code.jquery.com/ui/1.11.4/jquery-ui.js