<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<div class="container">
<div class="row">
<div class="col-xs-12 col-sm-8 col-md-6 col-sm-offset-2 col-md-offset-3">
<form role="form">
<h2 class="text-center">Sign Up</h2>
<div class="row">
<div class="col-xs-12 col-sm-6 col-md-6">
<div class="form-group">
<input type="text" name="first_name" id="first_name" class="form-control input-lg" placeholder="First Name" tabindex="1">
</div>
</div>
<div class="col-xs-12 col-sm-6 col-md-6">
<div class="form-group">
<input type="text" name="last_name" id="last_name" class="form-control input-lg" placeholder="Last Name" tabindex="2">
</div>
</div>
</div>
<div class="form-group">
<input type="text" name="display_name" id="display_name" class="form-control input-lg" placeholder="Mobile No." tabindex="3">
</div>
<div class="form-group">
<input type="email" name="email" id="email" class="form-control input-lg" placeholder="Email Address" tabindex="4">
</div>
<div class="row">
<div class="col-xs-12 col-sm-6 col-md-6">
<div class="form-group">
<input type="password" name="password" id="password" class="form-control input-lg" placeholder="Password" tabindex="5">
</div>
</div>
<div class="col-xs-12 col-sm-6 col-md-6">
<div class="form-group">
