There are lots of different Javascript libraries around which aim to enhance basic functionality or add new functionality, thus easing a developers life. Some of them are rather large, and from time to time we prefer to stick to Javascript’s basic functionality when developing a site. If you don’t want to use one of those libraries but would still like the one or other simplification, try the top 10 custom JavaScript functions.
Each of those functions solves a nasty and tedious aspect of Javascript-Programming, like for example the mising .getElementsByClas()

Top 10 custom JavaScript functions of all time