Tài liệu JavaScript as Programming Language

Fortunately, as programming languages go, JavaScript is
not too complicated to learn. By the time you get to the end of
this section you will understand what is needed to write basic
programs.
There are two ways in which you can insert JavaScript into
your web page:
ã Insert your JavaScript directly into your web page between two
SCRIPT elements.
ã Add your JavaScript to a text file and link the web page to the
text file.
To get started, we will use SCRIPT elements on a page to
separate the code. Later, you will create separate files for your
JavaScript. Following is a simple JavaScript file.