iframe does not show correct only on firefox?
<p>Below is my code....</p>

<pre><code>var iframe = document.getElementById('pltc');
iframe.contentWindow.document.open('text/htmlreplace');
iframe.contentWindow.document.write("&lt;input type='checkbox'/&gt;");
iframe.contentWindow.document.close();
</code></pre>

<p>On Chrome browser, I will get a checkbox on screen.
But in firefox, i will get plain html text on screen.</p>

<pre><code>&lt;input type='checkbox'/&gt;
</code></pre>

<p>Any reason why this happened?</p>