Post Affiliate Pro utilizes the Smarty template engine, which requires special attention when inserting certain types of text. In particular, the characters { and } are significant because Smarty uses them to parse template code.
JavaScript code often contains curly brackets, and directly placing JavaScript into a Smarty template may result in errors. Fortunately, this issue can be resolved by enclosing the JavaScript code within {literal} and {/literal} tags, as shown below:
{literal}
<script type="text/javascript">
var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "https://www.");
document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));
</script>
<script type="text/javascript">
try {
var pageTracker = _gat._getTracker("UA-xxxxxx-x");
pageTracker._trackPageview();
} catch(err) {}
</script>
{/literal}NOTE: JavaScript code will only be executed if it is placed in a .stpl file for security reasons.