Javascript CTRL+arrows combinations - remove pressed CTRL
<p>I have a textarea with a lot of lines and I want to scroll for one line within it by pressing CTRL+arrow up or down. Now I have this, which works well for scrolling.</p>

<pre><code>    document.onkeydown = keydown; 
    function keydown(evt)
      {
      if (!evt) 
      evt = event;
      if (evt.ctrlKey &amp;&amp; evt.keyCode == 40)
          {
          scrolled=document.getElementById("editContent").scrollTop;
          document.getElementById("editContent").scrollTop = scrolled+15;
          }
    }
</code></pre>

<p>So far I tried quite a lot to get "line down function" working but without sucess. Replacing pressed keys with others by ASCI codes not work because it seems that arrows does not have ASCI codes. Function "getselection" may work but there would be necessary to count number of chars in current line and so on. 
There would be nice to add in code above something like stop CTRL and send only UP/down arrow. Is it possbile? Thanks in advance for any help</p>
