Google can create a mathematics based heart shape for your beloved Valentine. Google search can actually plot any mathematics equation on a graph. Impress your love!
Tips and Tricks
In AJAX paradigm, onreadystatechange function of xmlHttp object does not accept any parameters. Learn how you can make this function do what you want.
Learn what are factory methods in context of system design approach. I will also explain how to use these methods to write more efficient code.