JavaScript is a scripting language that will allow you to add real programming to your webpages.
Since javascript isn't HTML, you will need to let the browser know in advance when you enter javascript to an HTML page. This is done using the  to tell where javascript starts and ends.

Consider this example:

The word alert is a standard javascript command that will cause an alert box to pop up on the screen. The visitor will need to click the "OK" button in the alert box to proceed. 




By entering the alert command between the 
 tags, the browser will recognize it as a javascript command.

If we had not entered the   sections of the document.
In general however, it is advisable to keep as much as possible in the section.
Knowing that javascript needs to be entered between