Google Analytics - custom track

<script type="text/javascript">
    var _gaq = _gaq || [];
    _gaq.push(['_setAccount', 'UA-xxxxxx']);
    _gaq.push(['_trackPageview']);
    _gaq.push(['_trackEvent', 'Video', 'Play', 'Úvodní video']);
    (function() {
        var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
        ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
        var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
    })();
</script>

<a href="javascript:;" onClick="_gaq.push(['_trackEvent', 'Video', 'Play', 'Úvodní video']);"></a>