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POPlaying audio via an iframe using javascript
 

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    <p>I have the following code in <code>abc.jsp</code></p> <pre><code> &lt;% out.write("&lt;script type=\"text/javascript\" src=\"scripts/test.js\"&gt;&lt;/script&gt;"); out.write("Here is filename"+sfl); out.write("" + "&lt;input type=\"button\" id=\"playBt\" value=\"Play Now\" onClick=\"playSound()\" &gt;" + "&lt;audio id=\"sound\" preload=\"auto\"&gt;" + "&lt;source src=\"music.ogg\" type=\"audio/ogg\" /&gt;" + "&lt;source src=\"music.mp3\" type=\"audio/mpeg\" /&gt;" + "Your browser does not support the audio element." + "&lt;/audio&gt;" ); out.write(""); %&gt; </code></pre> <p>Then content above was brought in in a frame in <code>index.jsp</code></p> <pre><code> &lt;iframe id='bgframe' style='display:compact;' src='abc.jsp' width="400" height="200"&gt;&lt;/iframe&gt; </code></pre> <p>This JavaScript function is now used - <code>test.js</code></p> <pre><code>function playSound() { var frameRef = document.getElementById('bgframe'); var sound = frameRef.contentWindow.document.getElementById'sound'); //var sound = frameRef.contentDocument.document.getElementById('sound'); sound.play(); } </code></pre> <p>The problem is that, the sound does not play when I click on play button. On the JavaScript console, the system returns null as value of <code>frameRef</code>. Also, I get the following error depending on whether I use <code>contentDocument</code> or <code>contentWindow</code>.</p> <blockquote> <p><code>Uncaught TypeError: Cannot read property 'contentDocument'</code><br> <code>Uncaught TypeError: Cannot read property 'contentWindow'</code></p> </blockquote> <p>I've implemented different solutions but the uncaught typedef error remains. </p> <p>Please what am I doing wrong here and how can I fix it? Why can't I access elements on frame <code>id=bgframe</code>?</p>
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