Web Design

213

CHAPTER

Adding Interactivity and Multimedia 9

8 Type a closing curly brace.
Note: Some editors, such as
Dreamweaver CS5, may
automatically insert the closing
curly brace.

The function code is added
to your page.

5 Press.

6 Type an opening curly brace.

7 Press twice.

6

8

TIPS

What is the purpose of the parentheses and curly

braces?

More complicated functions can have data passed to

them as arguments or parameters. The data a

function expects to be passed to it is included

within the parentheses. The curly braces are used

throughout the language to denote a block of code.

In the case of a function, they denote the code that

makes up the function.

Are there restrictions on what I can name the

function?

Yes. Function names must begin with a letter, and

can contain only letters, numbers, and underscores.

They cannot contain spaces or any other special

characters. JavaScript is case-sensitive. It does not

matter what case you use for your functions, but

you must be consistent.