In the top left corner of jsfiddle you'll see that your fiddle is set to run your js code "onLoad". What that really means is that jsfiddle creates this for you:
<script type='text/javascript'>//<![CDATA[
window.onload=function(){
// YOUR CODE HERE
}//]]>
</script>
As a result, your function is only accessible within that onload function. Change the value to "no wrap head" and you'll see that it works.
Your other option would be to make your function explicitly global:
window.getThought = function(){
// ...
http://jsfiddle.net/Ye9tG/5/
