Here are some common errors people make in JavaScript.

Learn:

• Syntax bugs happen when you type something the browser doesn’t understand, like alrt().

• Use Firefox’s error console to track down syntax errors.

• Logic errors are when you tell the browser to do the wrong thing.

• Use alert() statements to track program execution. If alert messages are supposed to show up, but don’t, you know what code is not executing.

• Use alert() statements to look at the values of variables.