Code analyzers and style checkers.
-*- outline -*-
* HTML.
<noscript> tag used to render HTML if JavaScript disabled in browser.
** Include in HTML.
<html>
<head>
<script type="text/javascript" src="abc.js"></script>
</head>
...
<html>
** Inline in HTML.
<html>
<h1>Hello!<h1/>
<script language="javascript">
<!--
alert("Hello!")
document.write("sin(10) = " + Math.sin(10))
//-->
</script>
</html>
* Hot calc by Firefox.
At URI type some thing like "javascript: 4+5"
* Reduce js code size.
http://crockford.com/javascript/jsmin
The JavaScript Minifier
http://developer.yahoo.com/yui/compressor/
YUI Compressor