Create a Quick Response Code (QR Code) image using Google Chart

Here is an example of generating a QR code image for the My developerWorks iphone app on iTunes: "<"img src="https://chart.googleapis.com/chart?chs=250x250&cht=qr&chl=http://itunes.apple.com/us/app/developerworks/id391162970?mt=8&choe=UTF-8" alt="Download developerWorks app" /">" QR codes have a different set of required parameters from any other chart: