Using this example, we can have content hidden in a div on the page, and reveal it once the user clicks the +1 button.
+1 this page to reveal new content!
Inside the <head> tag on your page, place the following (ideally just before the closing </head> tag). Download the required files on GitHub.
This will probably make better sense if you've read the blog post, but here's a quick explanation. Firstly we're including the script. Note the PATHTO (ie, where you've put it). Also note you should have already included jQuery. There are 5 settings here that we can customise. As above, each one needs a comma after it. The only things you need to include are listed in bold.