Or you could download http://www.jacklmoore.com/colorbox http://www.jacklmoore.com/colorbox and set the height and width to a percentage. That has always worked

Or you could download http://www.jacklmoore.com/colorbox http://www.jacklmoore.com/colorbox and set the height and width to a percentage. That has always worked for me. You can choose to put pretty much anything in there, not to mention that it is licensed under the MIT License. Still great work though, you got my vote, hope you sell a bunch of licenses!