There are thousands of Java Scripts freely available for downloading. These range from Drop Down menus to Snow Effects, from Mouse-over Effects to Digital Real-Time Clocks.
Java Scripts are useful for introducing limited animation to your web pages without the download times associated with Macromedia Flash animations. Your page tracking and Google Adsense tracking also use Java Scripts.
When companies can outsource their programming needs to low cost countries like India and China, they are unlikely to want very many highly paid programmers on their rolls.