Showing random div with javascript

Question

So I want to show random divs, and I found this stackoverflow solution here: Showing random divs using Jquery

And the correct answer uses this code: http://jsfiddle.

Answer 1

You are running the script before the HTML code for the body of the page has been parsed, so the elements doesn't exist yet.

Put your code in the ready event of the page:

$(document).ready(function(){
  // your Javascript code goes here
});

Also you are missing the include of the jQuery library, as Conner showed.