title: jQuery get the height from top
body: <p>I need to get the height from top of the page to current scrollbar position and place it to my link:</p>
  
  <pre><code>&lt;a class="poplight" rel="popup_name" href="#?w=here comes the value"&gt;&lt;/a&gt;
  </code></pre>
  
  <p>How can I do this?</p>