In connection with the audioLoader I have different results

audio-loader
loaders

#1

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 https://jsfiddle.net/uwrt8zad/3/
Is not working https://jsfiddle.net/k0g8yLbx/

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