Javascript chrome扩展中的谷歌分析api

我的chrome扩展名中有manifest和js文件
js文件中的代码：

var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'My account No.']);
_gaq.push(['_trackPageview']);

(function() {
  var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
  ga.src = 'https://ssl.google-analytics.com/ga.js';
  var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();


// MAIN CODE:

     var main_div = document.getElementsByClassName('someclass');
        var download_button = document.createElement('a');
        download_button.setAttribute("id", "download");
        download_button.style.color = "blue";
        download_button.href = "#";

        download_button.innerHTML = "Download";


        main_div[0].appendChild(download_button);
        _gaq.push(['_trackEvent', 'download', 'clicked']);
        download_button.addEventListener('click', Download_Answer, false);

我希望每次用户单击“下载”按钮时，google Analytical都应该跟踪此事件，并了解如何执行此操作。我没有得到我的结果。下面是使用的一个示例

假设您在

manifest.json

中为Google Analytics授予了正确的权限，请添加以下内容以设置Google Analytics：

// Standard Google Universal Analytics code
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,'script','https://www.google-analytics.com/analytics.js','ga'); // Note: https protocol here

ga('create', 'UA-XXXXX-YY', 'auto');
ga('set', 'checkProtocolTask', function(){}); // Removes failing protocol check. @see: http://stackoverflow.com/a/22152353/1958200
ga('send', 'pageview', '/options.html'); // A virtual pageview on your options page

使用jQuery，我会分配类似以下内容的单击事件：

$('#someButton').click(function () {
  ga('send', 'event', 'button', 'click', 'someButtonAction');
  // remaining logic for button click
});