live textarea Highlighter problem
<p>i using SyntaxHighlighter and i have an text area </p>

<pre><code>&lt;textarea id="content" onchange="perview();"&gt;&lt;/textarea&gt;
</code></pre>

<p>and</p>

<pre><code>function perview() {
var code = $("textarea#content").val();
$('#code-preview').html(code);
}   
</code></pre>

<p>and</p>

<pre><code>&lt;pre id="code-preview" class="brush: php;"&gt;&lt;/pre&gt;
</code></pre>

<p>and i started the highlightrt</p>

<pre><code>SyntaxHighlighter.all();
</code></pre>

<p>but when typing there is no any change happing
just there is an Highlighter has no text</p>
