http://learn-share.net/programming-basics-course/
Programming Course. The basics of Programming.
#8 Requesting Input
Learn to code.
Computer program are all about input, and output. For example, the input might be, the click on a button, or move the mouse. In the other side, in the output could be, change what displays on the screen, or cause the game controller to vibrate.
Javascript is all about the webpage. It doesn’t read files from your hard drive, it doesn’t talk directly to the printer. It is directly in what you could interact with the web page.