1. JavaScript is ECMAScript.

ActionScript and JScript are other languages that implement the ECMAScript.  JavaScript was submitted to ECMA for standardization but due to trademark issues with the name Javascript the standard became called ECMAScript. Every browser has a JavaScript interpreter.

2. JavaScript just for the front end.

With the advent of nodejs and io.js (and others) this is no longer true. JavaScript can now be used to build full fledged RESTful and socket based API’s. Take a look at loopback.io and hapi.js for two (of many) API libraries.

3. JavaScript is simple.

There was a period of time that JavaScript was for front end DOM manipulation and that was about it. Over time the language has matured into a wonderful and powerful functional programming language that can emulate multiple types of inheritance paradigms.

4. JavaScript is not scalable

If this were the case we would not see companies like Google and Facebook spending so much time using it. These guys know scalable and almost everything you use on both of those sites rely on the fact that it is scalable, modular and extensible.

5. JavaScript is boring

No way! You can do so much with it that boring should never enter your mind. Even if you think you have mastered the language, if you explore a bit more you will find the weird stuff left over to maintain backwards compatibility. Check out wtfjs.com for more.