Targeted at mobile webapplications where drawing a pattern on the touchscreen is far easier than typing in a password.
Works on every major desktop and mobile browser.
(NOTE: This repository has moved to https://github.com/steffest/PatternLock )
Copy these 2 lines in your HTML source
<link rel="stylesheet" type="text/css" href="_style/patternlock.css"/>
give your password input element the className "patternlock"
e.g. <input type="password" name="password" class="patternlock">