jQuery 1.6.4, HTML, CSS, JavaScript
Simple demonstration of how to do simple calculations with user input.
In response to http://stackoverflow.com/questions/5280396
In response to http://stackoverflow.com/questions/5227050/
In response to http://stackoverflow.com/questions/5208045
No-Library (pure JS), HTML, CSS, JavaScript
In response to http://stackoverflow.com/questions/5124845