BootBox

HTML

<script src="https://gist.githubusercontent.com/makeusabrew/6339916/raw/9d20dee005b6dbae294b9d7b34e74a93218d0e00/bootbox-setDefaults-v4.js"></script>
<script src="http://getbootstrap.com/dist/js/bootstrap.min.js"></script>
<script src="http://bootboxjs.com/bootbox.js"></script>
<link rel="stylesheet" href="http://getbootstrap.com/dist/css/bootstrap.min.css">

JavaScript

bootbox.dialog({
message: "I am a custom dialog",
title: "Custom title",
buttons: {
success: {
label: "Success!",
className: "btn-success",
callback: function() {
Example.show("great success");
}
}
}
}).init(function(){ 
    $('.btn-success').text('Custom Text')
});