How Do Pages Like Yahoo Finance Update Page Without Plugins Etc? (http Push)

I am interested in HTTP PUSH technologies. I am interested in the technology behind pages like Yahoo Finance etc, which are able to update the page with data in real time. When I c

Solution 1:

The techniques for HTTP PUSH and the like are

• Comet Technology
• WebSockets
• Java Applet / Flash WebSockets / SilverLight?
• Server-sent Events and EventSource
• HTTP server push

The Push technology article on wikipedia is a good read.

The Transports at socket.io should give you examples of how to implement these technologies.