<script language="javascript" src="http://google- code-prettify.googlecode.com/svn/trunk/src/prettify.js" type="text/javascript"> </script> <link href="http://google-code-prettify.googlecode.com/svn/trunk /src/prettify.css" rel="stylesheet" type="text/css"> </link>
Second, search for <body> tag and put
onload="prettyPrint()"as attribute.
Finally, when you want to add code post you can write.
<pre class="prettyprint"> ......... your code ......... </pre>
p.s. js,stylesheet can be downloaded and upload to somewhere ex. google-site and then change the link to your site.