xxnikolayxx,
Качаешь архив и подключаешь bootstrap.min.js и стили.
Вот пример:
<html>
<head>
<meta charset="utf-8" />
<title>Plusstrap 101 Template</title>
<link href="css/plusstrap.min.css" rel="stylesheet">
<script type="text/javascript" src="js/jquery-1.8.2.min.js"></script>
<script type="text/javascript" src="js/bootstrap.min.js"></script>
<script type="text/javascript">
$(document).ready(function ()
{
$('.alert').alert();
});
</script>
</head>
<body>
<div class="alert">
<button type="button" class="close" data-dismiss="alert">×</button>
<strong>Warning!</strong> Best check yo self, you're not looking too good.
</div>
</body>
</html>