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Depending on who you talk to, JavaScript is probably held in a very different light. On one hand it's responsible for a lot of the browser exploits and popups that make the web irritate like a rash. It's also a language that didn't always have great IDE and debugging support which made authoring anything of size in JavaScript more than a headache. On the other it's really the only language you can use to write client side web applications (less Flex/Silverlight).