Using this example we can popup a download link when the user clicks the +1 button.
+1 to get your download link!
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 (the blog post should explain the CSS better). Firstly we're including the css file, then including the script. Note the PATHTO (ie, where you've put it). Also note you should have already included jQuery. There are 6 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.