<link rel="stylesheet" href="your path/placeholder.css" />

<script type="text/javascript" src="your path/jquery.js" ></script>
<script type="text/javascript" src="your path/calendar.js" ></script>

<form>
    <div class="placeholder-wrap">
        <label class="placeholder js-placeholder">Email</label>
        <input class="input" type="text" placeholder="Email" />
    </div>
    <div class="placeholder-wrap">
        <label class="placeholder js-placeholder">Password</label>
        <input class="input" type="password" placeholder="Password" />
    </div>
    <div class="placeholder-wrap">
        <label class="placeholder js-placeholder">Textarea</label>
        <textarea class="textarea" placeholder="Textarea"></textarea>
    </div>
</form>