There is some code I wanted to put into JSFiddle. It didn’t work. Narrowing it down I can’t even get this simplest of code to work:

JSFiddle

function displaymessage() {

  alert(Hello World!);

}

<form>

  <input type=button value=Click me! onclick=displaymessage() />

</form>



<p>By pressing the button above, a function will be called. The function will alert a message.</p>

The alert box doesn’t show up in the JSFiddle.