Netzz

When you use CDN to load scripts and fonts from a page running in https you have to use https for every external url avoiding mixing content:

https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js
https://fonts.googleapis.com/css?family=Open+Sans

You can also omit the http: from the url letting the browser use the same protocol of the page.