<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>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-type" content="text/html; charset=utf-8">
<title>Multiple step form</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css">
<script type="text/javascript" src="js/jquery-1.9.0.js"></script>
<script type="text/javascript" src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.13.1/jquery.validate.js"></script>
<script type="text/javascript" src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.13.1/additional-methods.js"></script>
<style type="text/css">
#personal_information,
#company_information{
display:none;
}
</style>
</head>
<body>
<div class="container">
<div class="col-lg-5">
<form class="form-horizontal" action="" method="POST" id="myform">
<fieldset id="account_information" class="">
<legend>Account information</legend>
<div class="form-group">
<label for="username" class="col-lg-4 control-label">Username</label>
<div class="col-lg-8">
<input type="text" class="form-control" id="username" name="username" placeholder="username">
</div>
</div>
<div class="form-group">
<label for="password" class="col-lg-4 control-label">Password</label>
<div class="col-lg-8">