update textarea content on click on an input button
<p>i want update textarea content onclock on a input button</p>

<p>for example:</p>

<pre><code>&lt;input type="button" value="Reply" onclick="update('Ahmed')"&gt;
&lt;textarea id="comment_content"&gt;&lt;/textarea&gt;
//i want set textarea content to @/Ahmed/ onclick on the above button
//example for the javascript function
function update(var){
getElementByID('comment_content') = '@/'.var.'/'
//set the textarea to @/Ahmed/
}
</code></pre>

<p>I have another question.. i want onclick on the button, i want send the user to the end of the page ( to the new_comment div )</p>

<p>i want javascript code, not jquery</p>
