<title>Bootstrap Disable All Form Elements</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" crossorigin="anonymous">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" crossorigin="anonymous"></script>
<h2>Bootstrap Disable All Form Elements</h2>
<label for="Username">Username</label>
<input type="email" class="form-control" name="username" id="email8" placeholder="Disabled Input">
<label for="Password">Password</label>
<input type="password" class="form-control" name="password" id="password8" placeholder="Disabled Input">
<button type="submit" class="btn btn-primary">Login</button>