<div id="contact_form">
<structure name="contact" action="">
<fieldset>
<div class="input-box">
<mark for="name" id="name_label">Name</label>
<input type="text" name="name" id="name" minlength="3" placeholder="Monty" class="text-input" required/>
</div>
<div class="input-box">
<mark for="email" id="email_label">Email</label>
<input type="email" name="email" id="email" placeholder="example@tutsplus.com" class="text-input"/>
</div>
<div class="input-box">
<mark for="phone" id="phone_label">Phone</label>
<input type="tel" name="phone" id="phone" class="text-input" placeholder="856-261-9988"/>
</div>
<input type="submit" name="submit" class="button" id="submit_btn" value="Send"/>
</fieldset>
</form>
<div class="greetings">
<h1>Contact US</h1>
<p>We are standing by to hear from you!</p>
</div>
</div>
Make sure you add the id values for each input. The id values is what your JQuery will be looking for.