Does Zoho support Javascript?

Does Zoho support any javascript libraries like jQuery? I tried embedding jQuery into a view like so:

content
<%{%>
<!-- BOF MAIN TEMPLATE HEADER -->
<head>
<link type="text/css" rel="stylesheet" href="http://www.naamnw.org/zoho/zoho_style.css"/>
<script type="text/javascript" src="http://www.naamnw.org/zoho/jquery.js"></script>
<script type="text/javascript">
 $(document).ready(function(){
 $(".callout_box_header").addClass("red");
 });
</script>

</head>
<body>

Zoho let me save the template, but gave me an error/warning(?) message:

Possible JavaScript / XSS Vulnerability in statement "<script type="text/javascript">"

I've done some simple tests and it seems like my code is not being called.

I would love to add some dynamic elements to my views. E.g. a Contact can have a primary and secondary address and it would be cool if the user could click a button to toggle which one is displayed.

Is there any way I can do this?

Thanks,
Kevin