[dsuth]

From the page:

"If you're interested in using any of this code in your applications, feel free to do so! You don't need to cite me or this website as a source, though I would appreciate it if you did. However, please don't plagiarize the code here by claiming authorship - that would just be dishonest. I also caution you that while I'm fairly confident that the code on this site is correct, I haven't mercilessly tested every line, and so there may be a lurking bug or two here."