How to define my own js function in jsfiddle?

I want to test how my own function update works on jsfiddle but 开发者_高级运维when I click the button I get an error that update is not defined.

How can I use my own functions on jsfiddle?

Two problems:

The first problem is that you have some extra text at the end of the script:

})();

The second problem is that you are wrapping the function definitions inside the onDomReadyfunction.

Change this option to no wrap(head) and it will work.