What this really shows is that (1) most programming is "IT" programming (i.e. focused development for specific businesses), (2) most IT programming is user-focused, and (3) we've seen a rapid shift in the customer's preferred UI environment.
Java was a revelation for people developing client software in the 90's. It was faster and easier, and in many cases could be deployed over the web. Its later wins on the server backend (which came more slowly) were driven by the client side.
And Javascript is taking that mantle, driven by the mobile world. Yes, you could still develop a Windows client app, but it won't work on your employees iPhones and Galaxy S3's. So you deploy a web app instead.
And thus you use Javascript.
What is changing now is that people / employees have realized that it's convenient to be able to use any browser, from any device (desktop / laptop / tablet / smartphone), from any OS (iOS, Linux / Android, OS X, Windows) on the client-side.
And the one indisputed king inside the browser to code the client-side is JavaScript.
IMHO It's not exactly as if monothreaded JavaScript engines are going to displace server-side Java / C# anytime soon.
Webapps are accessed from clients using JavaScript. But Webapps themselves, at least for many "enterprisey" stuff are very often coded in Java or C# (or at least virtually always in languages targetting either the JVM or .Net).
So even though C# won't be going away any time soon, it still shows well below Javascript in terms of "acceptance".
[1] http://www.tiobe.com/index.php/content/paperinfo/tpci/index....
I jest, but seriously, popularity of a tag on StackOverflow should be used to determine one thing: popularity of a tag on StackOverflow. There are more important factors influencing a subject's popularity on SO than its overall popularity. A big factor is where the community around the technology tends to congregate. Many projects (like Guava: http://code.google.com/p/guava-libraries/) officially endorse StackOverflow as the place to ask questions, because the maintainers and experts will be monitoring SO. That will have an inflating impact on its relative popularity.
Not a big deal it just seems odd to me. At least they didn't put HTML up there :)
You should have also added JS even though you use the jQuery library extensively.