In connection with the audioLoader I have different results

I have different results with the following Code. Actually, everything works, except for the desired output via
the radio-buttons. In the first fiddle everything works, in the second fiddle I get the message and error onklick="check();" and check is not defined, although it is exactly the same Code. The same thing happens on my page. What’s wrong here? Does somebody has any idea?

Is working
Is not working

Update: The problem is with the setting “No wrap - in body” fixed.