There should be a box above the top of this Web page. It should have this text in it:
That’s called your address bar. You can type stuff in there to tell your computer where you want to go on the Web. You can also use it to hack the page you’re on.
Your first mission, should you choose to accept it, is to hack that address bar so it says this instead:
When you’re done, press enter.
Good luck, agent. We’ll rendevous with you upon the completion of your mission.
Excellent work, agent.
That word you typed, javascript, is the name of a powerful language that makes up the brain and central nervous system of a Web page.
Typing something that starts with javascript: into your address bar is like injecting a syringe into the Website you’re looking at.
It gives you the power to reshape and remix the Web.
But it can also be used for great evil, so be careful when a stranger tells you to inject JavaScript through your browser’s address bar.