The following code shows how to add ok button to button.
<!DOCTYPE html>
<html>
<body>
<link
href="http://netdna.bootstrapcdn.com/font-awesome/3.0/css/font-awesome.css"
rel="stylesheet">
<body>
<button id="edit-listing-form-house_Continue"
class="btn btn-large btn-primary" style="" name="Continue"
type="submit">
<span>Continue</span> <i class="icon-ok"
style="font-size: 30px; vertical-align: middle;"></i>
</button>
</body><!-- www . j ava 2 s . c o m-->
</html>