Try using this revised version of the function play()
function play()
{
var embed=document.createElement('object');
embed.setAttribute('type','audio/wav');
embed.setAttribute('data', 'c:est.wav');
embed.setAttribute('autostart', true);
document.getElementsByTagName('body')[0].appendChild(embed);
}
The problem with your code was you were using the src attribute, which is for the <embed> tag. Instead, use the data attribute for the <object> tag.
If you are trying to get the most compatibility out of this, you should also consider adding the embed tag as an alternate for the object tag. The way it works is like this:
<object data="test.wav" type="audio/wav" autostart="true">
<embed src="test.wav" autostart="true" alt="Could not load audio" />
</object>
This works similar to the noscript tag, where older browsers that don't support the object tag resort to the embed tag.
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