Google Analytics lets you track any browser based event, including Flash and JavaScript events by using the _trackPageview function, you can assign a page filename to any Flash action, and enter that filename into the appropriate goal or funnel step. Important: Please note that your analytics tracking code and calls to _gat._getTracker must be placed on the page above the call to _trackPageview.

<script type="text/javascript">
var gaJsHost = (("https:"
    == document.location.protocol) ? "https://ssl." 
    : "http://www.");
 
document.write(unescape("%3Cscript src='" 
    + gaJsHost + "google-analytics.com/ga.js' 
    type='text/javascript'%3E%3C/script%3E"));
</script>
 
<script type="text/javascript">
var pageTracker = _gat._getTracker("UA-xxxxxx-x");
pageTracker._trackPageview();
</script>

To track an event, call _trackPageview() with an argument specifying a name for the event. For example, calling:

pageTracker._trackPageview("/purchase_funnel/page1.html");

will cause each occurrence of the the calling Flash event to be logged as though it were a pageview under the name /purchase_funnel/page1.html . The argument must begin with a forward slash and be in quotes. The event names may be organized into any directory style structure you wish. The path/filename argument to _trackPageview need not represent an actual URL on your website.

Flash Code Examples

on (release) {
// Track with no action
getURL("javascript:pageTracker._trackPageview('/folder/file.html');");
}
 
on (release) { 
//Track with action 
getURL("javascript:pageTracker._trackPageview('/folder/file.html');"); 
_root.gotoAndPlay(3); 
myVar = "Flash Track Test"; 
}
 
onClipEvent (enterFrame) {
getURL("javascript:pageTracker._trackPageview('/folder/file.html');");
}

To verify that _trackPageview is being called correctly, you can check your Top Content report 24-48 hours after the updated tracking code has been executed. You should be able to see the assigned pagename in your report.

Source: Google Analytics Help