<!DOCTYPE html>
<html>
<head>
<link href="style.css" rel="stylesheet" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="jquery-ui.js"></script>
<script>
$(document).ready(function() {
$("#states").select2();
});
</script>
</head>
<body>
<select style="width:300px" id="states">
<option value="CA">California</option>
<option value="NV">Nevada</option>
<option value="OR">Oregon</option>
<option value="WA">Washington</option>
<option value="AZ">Arizona</option>
<option value="CO">Colorado</option>
<option value="ID">Idaho</option>
<option value="MT">Montana</option>
<option value="AZ">India</option>
<option value="NE">Nebraska</option>
<option value="NM">New Mexico</option>
<option value="ND">North Dakota</option>
<option value="UT">Utah</option>
<option value="WY">Wyoming</option>
</select>
</body>
</html>