看見(jiàn)很多網(wǎng)站源文件都有這么一段代碼？是什么意思??？
<script type="text/javascript">
var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-30210234-1']);
_gaq.push(['_trackPageview']);
(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>
誰(shuí)能幫我解釋一下，下面腳本是什么意思？
慕容3067478
2018-12-07 04:18:04
