Question

Browser environments contain other functions besides alert for popping up windows. You can ask the user an OK/Cancel question using confirm . This returns a Boolean: true if the user clicks OK and false if the user clicks Cancel.

confirm("Shall we, then?");

The prompt function can be used to ask an “open” question. The first argument is the question, the second one is the text that the user starts with. A line of text can be typed into the dialog window, and the function will return this text as a string.

prompt("Tell me everything you know.", "...");

These two functions aren’t used much in modern web programming, mostly because you have no control over the way the resulting windows look, but they are useful for toy programs and experiments.

This is a book about getting computers to do what you want them to do. Computers are about as common as screwdrivers today, but they contain a lot more hidden complexity and thus are harder to operate and understand. To many, they remain alien, slightly threatening things.