How to add value from a iframe using javascipt?
<p>I have a sample code:
in index.html</p>

<pre><code>&lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt;  
&lt;html xmlns:fb="http://ogp.me/ns/fb#"&gt;
&lt;head&gt;  
&lt;meta http-equiv="Content-Type" content="text/html; charset=utf-8" /&gt;  
&lt;title&gt;index&lt;/title&gt;  
&lt;/head&gt;  
&lt;body&gt;
&lt;input type="text" value="" name="test" id="text_input"&gt;
&lt;iframe src="iframe.html"&gt;
&lt;/body&gt; 
&lt;/html&gt;
</code></pre>

<p>And iframe.html</p>

<pre><code>&lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt;  
&lt;html xmlns:fb="http://ogp.me/ns/fb#"&gt;
&lt;head&gt;  
&lt;meta http-equiv="Content-Type" content="text/html; charset=utf-8" /&gt;  
&lt;title&gt;iframe&lt;/title&gt;  
&lt;script&gt;
function getValue(text) {
    document.getElementById('text_input').value = text;
}
&lt;/script&gt;
&lt;/head&gt;  
&lt;body&gt;
&lt;a href="#" onclick="getValue('test');"&gt;Click&lt;/a&gt;
&lt;/body&gt; 
&lt;/html&gt;
</code></pre>

<p>When click on a tag, value "text" can not be passed on <code>from iframe to index.html</code>, how to fix it ?</p>
