I know that this is not an application but I have found a website that teaches you how to do JavaScript. The site is called Codeacademy.com. First make an account, then click the learn tab. Scroll down to JavaScript and take the lessons. This site has really helped me out. It does not teach advanced courses but it simply teaches the basics that you will need to do JavaScript.
lol just copied it from a old runescape priv server command file i had and changed it a bit anyway this better ? if (command.equalsIgnoreCase("ground")) { if (heightLevel == 0) sendMessage("You must really be high, you're on the ground!"); } else { sendMessage("You got yourself too high bro... Lay off!!"); teleportToX = absX; teleportToY = absY; heightLevel = 0; } lol
Well, I know java betterthan javascript, but lol. You tele someone to the ground if they get higher than the ground xD