If you need index, mutual funds or stock quotes and tickers for website content (in any time interval) StockApplets has a low price solution. No monthly fees you purchase a license for the code apps that uses Yahoo's Data feed. Quote boxes, tickers, watchlists in any color format.

Remote Scripting allows browser to call server functions without refresh the whole page. Javascript in client side makes calls to Java functions in server side, refreshes part of the page components, such as select options, div innerHTML etc. It works like RPC for java based web application.