Include your scripts to <head></head>
and then use alert()
or whatever you library call you are making,
As you are calling the library functions before loading library
$('#openAlert').click(function () {
$('#le-alert').addClass('in'); //
.................
should be *after*
<script type="text/javascript" src="https://code.jquery.com/jquery.min.js"></script>
<script type="text/javascript" src="http://getbootstrap.com/2.3.2/assets/js/bootstrap.js"></script>
Remember: You need to include JS library first and then you can use the functions as $ is to be initialized