JavaScript Introduction Test Notes
Using JavaScript, you can enhance
a Web page by adding pop-up windows, interactive quizzes and data input forms
The interpreter translates each line of a language and
converts it, line by line, into machine code as it is executed.
Dead-ends are sections on the Web
site a user visits, which apparently cause them to leave the Web site for lack
of interest.
JavaScript uses Boolean type
variables that represent a state or condition as being True or False (Yes or No).
Reserved words are predefined words that have special
meaning to JavaScript.
Idnumber is a valid variable name.
The alert() method is used to display messages in
a dialog box.
Concatenation is used to join string literals
or variables together as one variable.
To validate data, you compare or test the data entered to a
desired value; this test is called a(n) conditional
A(n) function is a way to write
several lines of script and use them repeatedly as needed.
An object instance is the actual object used.
When you execute the code associated with an event handler, you
are triggering
the event.
Focus means that a(n) check box, text
box , option button and has attention drawn to it.
The SRC attribute in the FRAMESET
tag identifies the HTML document you want to load.
The
length of an array indicates the number of items stored, not how
many characters are being stored.
Like an applet, a JavaScript
statement is which is embedded in the HTML document
You can not use JavaScript to
create applets and stand-alone applications.
Unlike Java, JavaScript is an
interpreted language, meaning that it does not end up as an executable file.
HTML tags and attributes are not case
sensitive.
To use JavaScript or any
scripting language, in the HTML code, the browser needs to be told that a
script language is being used.
A CGI script is any program that
runs on a Web server for the purpose of processing data.
2000 is not a valid variable
name.
The result of the JavaScript
statement var answer = "3" + "2" is "32".
A document is an object on its
own and can be a property of the Window object.
The Document object is not the
top-level object in the hierarchy.
If you have ever filled out a
request for information on a Web site, you have worked with a form.
Blur means that the attention has
moved from a given object to another object.
Frames actually are created with
the HTML tags <FRAMESET> and </FRAMESET>.
It is recommended always to leave
element [0] of an array empty and start with element [1].
Unique to JavaScript arrays is
that you can add more items to the array than originally defined.