If PHP remained at the same place, and Ruby went up, JavaScript, which in most cases comes along with those two languages should have remain at the same position and not going down.
Let alone, Python and C# which in many cases used for web development.
It took me a couple of times through to grok your intention...but I agree, JavaScript is extremely underrepresented in almost every language popularity study I've seen. It's so pervasive that everybody needs to know it. We build systems management software, and I've had to learn JavaScript. It's definitely not becoming less important over time...the "View" in MVC is eventually going to be nothing but JavaScript (by some definition of "view" and some definition of "MVC"--probably technically more accurate to say that there will be an MVC, with a lightweight MC, in JavaScript and an MVC, with a lightweight data structure V, on the server and they'll communicate via JSON or something). Anyway, Yegge is sorta fruity on some things, but I think he was spot on when he called JavaScript the "Next Big Language". We're only a few years into development of a "library culture" in JavaScript, but it's already obvious, to me anyway, that the future of the UI for most applications is JavaScript.
Let alone, Python and C# which in many cases used for web development.