<!DOCTYPE html>
<html>
<head>
<script src="/lib/jquery-1.12.2.min.js"></script>
<script>
$(document).ready(function(){
$("input").select(function(){
$("input").after(" Text marked!");
});
});
</script>
</head>
<body>
<input type="text" value="Hello World">
<p>Select some text inside the input field.</p>
</body>
</html>