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Welcome to Lesson 1! Modifying existing web pages does not have to be difficult. There is no need to learn the entire HTML programming language as this tutorial is designed to provide a general understanding of the codes. In this lesson the following basic definitions and relevant tags are discussed:
·
What is HTML?
·
What are Tags?
·
Explanation of
Document Structure
·
Explanation of
Document Structure Tags
What is HTML?
HTML (Hyper Text Markup Language) is the language used to
write Web pages, which consists of codes (tags) embedded in the text of a
document.
What are Tags?
Tags are codes in an HTML document, which the browser reads
and then interprets for subsequent display to a reader. Tags are not visible
when an HTML document is viewed in a browser, but their effects are. Tags begin
with the opening symbol "<" and end with the closing symbol
">"; and usually come in pairs, one that begins an action and one
that ends it.
Below is an example of an HTML tag and its respective
browser display:
|
HTML
Code |
|
Browser
Display |
|
I
want to <B> emphasize </B> this! |
|
I
want to emphasize this! |
* Do not worry about memorizing all the tags described in
these lessons. Any tags that are required are listed in the accompanying HTML
Reference Guide, which can be printed for reference purposes.
Explanation of Document Structure
Each HTML document has a minimum number of tags. Here is
the very least HTML code that can be called a "page":
<HTML>
<HEAD>
<TITLE>This is my page Title!</TITLE>
</HEAD>
<BODY>
This is my message to the world!
</BODY>
</HTML>
NOTE: HTML is not case sensitive. <title> is equivalent to <TITLE>
or <TiTlE>.
Explanation
of Document Structure Tags
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<HTML>...</HTML>
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Encloses
the entire HTML document.These tags let the browser know to start
reading and displaying the information presented within. |
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<HEAD>...</HEAD>
|
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The
<HEAD> element contains all information about the document in
general. It contains HTML elements that describe the document's usage
and relationship with other documents. |
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<TITLE>...</TITLE>
|
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The
<TITLE> is contained in the <HEAD> of the document. It is
displayed at the top of the browser window and on the bookmark list, so
it is important to choose something descriptive, unique, and relatively
short. |
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<BODY>...</BODY>
|
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The
<BODY> element contains all the information, which is part of the
document. There
are a number of different attributes for the <BODY> tag
(attributes are the elements included within brackets that change the
behavior or appearance of a tag). They are: "BACKGROUND="
Specifies the image tile that is to appear in the document's background.
EXAMPLE: <BODY BACKGROUND= "picturename.gif">
</BODY> "BGCOLOR="
Sets the background color of the page. In order to do this a six digit
hexadecimal number denoting a red-green-blue color value is included.
Thus "000000" is black and "FFFFFF" is white and
every other colour in between is described using these 6 characters in
different combination. In addition to the hexadecimal system, there are
sixteen color names that (other than black) that can be included in the
tags. They are: Aqua, Red, Green, Blue, Violet, Fuchsia, Gray, Lime,
Maroon, Navy, Olive, Purple, Silver, Teal, White, and Yellow. EXAMPLE: <BODY BGCOLOR="#FFFFFF"> OR EXAMPLE: <BODY BGCOLOR="WHITE"> "LINK="
Sets the hexadecimal color code for links that have not yet been
visited. EXAMPLE: <BODY LINK="#0C6249"> VLINK=
Sets the hexadecimal color code for links the user has already visited. EXAMPLE: <BODY VLINK="#800080"> "ALINK="
Sets color of links that are active (ie., the color they turn when the
link is clicked on). EXAMPLE: <BODY ALINK="#FFB50C"> "TEXT="
Sets the hexadecimal color code for the default text color. EXAMPLE: <BODY TEXT="#00006A"> The
<BODY> tags for this document are as follows: |
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An excellent way to learn HTML is to view the coding used
on other web pages. To do this in either Netscape or Internet Explorer - select
"View Source" from the "View" menu. The file contents with
all the HTML tags will be displayed in a new window.
Try it out!
In the Box below, type the following HTML code, then click
the "View" button. The HTML document you made will be displayed in a
new browser window. You may wish to experiment by changing the words within the
tags.
Try typing this:
<HTML>
<HEAD>
<TITLE>My first Web page</TITLE>
</HEAD>
<BODY BGCOLOR="#800080"
TEXT="#FFFFFF">
Type a message here.
</BODY>
</HTML>
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