The output of "Hello World" to the user is a popular sample to show the very basics of a programming language/environment. With JavaScript there are various ways to accomplish this task.

1. Show a message box from the address line

To run this sample just copy the code out of the following textbox into the address line of your browser and press enter.

2. Write a document from the address line

To run this sample just copy the code out of the following textbox into the address line of your browser and press enter.

3. Show a message box when a button on a form is clicked.

4. Modify the content of the document when the status of a check box changes.