What is HTML?
This lesson will give you a brief presentation of your new friend, HTML.
What is HTML?
HTML is the "mother tongue" of your browser.
To make a long story short, HTML was invented in 1990 by a scientist called Tim Berners-Lee. The purpose was to make it easier for scientists at different universities to gain access to each other's research documents. The project became a bigger success than Tim Berners-Lee had ever imagined. By inventing HTML he laid the foundation for the web as we know it today.
HTML is a language, which makes it possible to present information (e.g. scientific research) on the Internet. What you see when you view a page on the Internet is your browser's interpretation of HTML. To see the HTML code of a page on the Internet, simply click "View" in the top menu of your browser and choose "Source".

For the untrained eye, HTML code looks complicated but this tutorial will help you make sense of it all.
What can I use HTML for?
If you want to make websites, there is no way around HTML. Even if you're using a program to create websites, such as Dreamweaver, a basic knowledge of HTML can make life a lot simpler and your website a lot better. The good news is that HTML is easy to learn and use. In just two lessons from now you will have learned how to make your first website.
HTML is used to make websites. It is as simple as that!
Okay, but what does H-T-M-L stand for?
HTML is an abbreviation of "HyperText Mark-up Language" - which is already more than you need to know at this stage. However, for the sake of good order, let us explain in greater detail.
• Hyper is the opposite of linear. In the good old days - when a mouse was something the cat chased - computer programs ran linearly: when the program had executed one action it went to the next line and after that, the next line and so on. But HTML is different - you can go wherever you want and whenever you want. For example, it is not necessary to visit MSN.com before you visit HTML.net.
• Text is self-explanatory.
• Mark-up is what you do with the text. You are marking up the text the same way you do in a text editing program with headings, bullets and bold text and so on.
• Language is what HTML is. It uses many English words.
In this tutorial you will learn so-called XHTML (Extensible HyperText Mark-up Language) which, in short, is a new and more well-structured way of writing HTML.
Now you know what HTML (and XHTML) stands for let's get started with what it is all about: making websites.


Lesson 1: Let's get started
In this first lesson, you will get a brief presentation of the tools you need to make a website.
What is needed?
Most likely you already have everything you need.
You have a "browser". A browser is the program that makes it possible to browse and open websites. Right now you are looking at this page in your browser.
It is not important which browser you use. The most common is Microsoft Internet Explorer. But there are others such as Opera and Mozilla Firefox and they can all be used.
You might have heard about, or even used, programs such as Microsoft FrontPage, Macromedia Dreamweaver or even Microsoft Word, which can - or claim that they can - create websites for you. Forget these programs for now! They are not of any help to you when learning how to code your own website.
Instead, you need a simple text editor. If you are using Windows you can use Notepad, which is usually found in the start menu under Programs in Accessories:

If you are not using Windows, you can use a similar simple text editor. For example, Pico (Linux) or TextEdit (Mac).
Notepad is a very basic text editing program which is excellent for coding because it does not interfere with what you are typing. It gives you complete control. The problem with many of the programs that claim they can create websites is that they have a lot of standard functions, which you can choose from. The downside is that, everything needs to fit into these standard functions. Thus, this type of programs often cannot create a website exactly as you want it. Or - even more annoyingly - they make changes to your hand-written code. With Notepad or other simple text editors, you only have yourself to thank for your successes and errors.
A browser and Notepad (or a similar simple text editor) are all you need to go through this tutorial and make your own websites.
Do I need to be online?
You do not need to be connected to the Internet - neither while reading this tutorial, nor while making your websites.
If you want to avoid being online while reading this tutorial, you can either print it out or simply disconnect from the Internet while reading on screen. You can make the website on your computer's hard disk and upload it to the Internet when it is finished.
Elements and tags
You are now ready to learn the essence of HTML: elements.
Elements give structure to a HTML document and tells the browser how you want your website to be presented. Generally elements consists of a start tag, some content, and an end tag.
"Tags"?
Tags are labels you use to mark up the begining and end of an element.
All tags have the same format: they begin with a less-than sign "<" and end with a greater-than sign ">".
Generally speaking, there are two kinds of tags - opening tags: <html> and closing tags: </html>. The only difference between an opening tag and a closing tag is the forward slash "/". You label content by putting it between an opening tag and a closing tag.
HTML is all about elements. To learn HTML is to learn and use different tags.
Can you show me some examples?
Okay, the element em emphasis text. All text between the opening tag <em> and the closing tag </em> is emphasised in the browser. ("em" is short for "emphasis".)
Example 1:

<em>Emphasised text.</em>

Will look like this in the browser:
Emphasised text.
The elements h1, h2, h3, h4, h5 and h6 is used to make headings (h stands for "heading"), where h1 is the first level and normally the largest text, h2 is the second level and normally slightly smaller text, and h6 is the sixth and last in the hierarchy of headings and normally the smallest text.
Example 2:

<h1>This is a heading</h1>
<h2>This is a subheading</h2>

Will look like this in the browser:
This is a heading
This is a subheading
So, I always need an opening tag and a closing tag?
As they say, there's an exception to every rule and in HTML the exception is that there are a few elements which both open and close in the same tag. These so-called empty elements are not connected to a specific passage in the text but rather are isolated labels, for example, a line break which looks like this: <br />.
Should tags be typed in uppercase or lowercase?
Most browsers might not care if you type your tags in upper, lower or mixed cases. <HTML>, <html> or <HtMl> will normally give the same result. However, the correct way is to type tags in lowercase. So get into the habit of writing your tags in lowercase.
Where do I put all these tags?
You type your tags in an HTML document. A website contains one or more HTML documents. When you surf the Web, you merely open different HTML documents.
Create your first website
With what you learned in the previous lessons, you are now only minutes away from making your first website.
How?
In Lesson 1 we looked at what is needed to make a website: a browser and Notepad (or similar text editor). Since you are reading this, you most likely already have your browser open. The only thing you need to do is to open an extra browser window (open the browser one more time) so you can read this tutorial and see your new website at the same time.
Also, open Notepad (in Accessories under Programs in the Start menu):

Now we are ready!
What can I do?
Let us start with something simple. How about a page that says: "Hurrah! This is my first website." Read on and you'll find out how simple it is.
HTML is simple and logical. The browser reads HTML like you read English: from the top down and from left to right. Thus, an simple HTML document begins with what should come first and ends with what should come last.
The first thing you need to do is to tell the browser that you will "talk" to it in the language HTML. This is done with the tag <html> (no surprises there). So before you do anything else type "<html>" in the first line of your document in Notepad.
As you may recall from the previous lessons, <html> is an opening tag and must be closed with a closing tag when you are finished typing HTML. So to make sure you don't forget the HTML close tag now type "</html>" a couple of lines down and write the rest of the document between <html> and </html>.
The next thing your document needs is a "head", which provides information about your document, and a "body", which is the content of the document. Since HTML is nothing if not logical, the head (<head> and </head>) is on top of the body (<body> and </body>).
Your document should now look like this:

<html>

<head>
</head>

<body>
</body>

</html>

Note how we structured the tags with new lines (using the Enter key) as well as indents (using the Tab key). In principle, it does not matter how you structure your HTML document. But to help you, and others reading your coding, to keep an overview, it is strongly recommended that you structure your HTML in a neat way with line breaks and indents, like the above example.
If your document looks like the above example, you have made your first website - a particularly boring website and probably not what you dreamt of when you started this tutorial but still some sort of a website. What you have made will be the basic template for all your future HTML documents.
So far so good, but how do I add content to my website?
As you learnt earlier, your HTML document has two parts: a head and a body. In the head section you write information about the page, while the body contains the information that constitutes the page.
For example, if you want to give the page a title which will appear in the top bar of the browser, it should be done in the "head" section. The element used for a title is title. I.e. write the title of the page between the opening tag <title> and the closing tag </title>:

<title>My first website</title>

Note that this title will not appear on the page itself. Anything you want to appear on the page is content and must therefore be added between the "body" tags.
As promised, we want the page to say "Hurrah! This is my first website." This is the text that we want to communicate and it therefore belongs in the body section. So in the body section, type the following:

<p>Hurrah! This is my first website.</p>

The p in <p> is short for "paragraph" which is exactly what it is - a text paragraph.
Your HTML document should now look like this:

<html>

<head>
<title>My first website </title>
</head>

<body>
<p>Hurrah! This is my website.</p>
</body>

</html>

Done! You have now made your first real website!
Next all you have to do is to save it to your hard drive and then open it in your browser:
• In Notepad choose "Save as..." under "File" in the top menu.
• Choose "All Files" in the "Save as type" box. This is very important - otherwise, you save it as a text document and not as an HTML document.
• Now save your document as "page1.htm" (the ending ".htm" indicates that it is an HTML document. ".html" gives the same result. I always use ".htm", but you can choose whichever of the two extensions you prefer). It doesn't matter where you save the document on your hard drive - as long as you remember where you saved it so you can find it again.

Now go to the browser:
• In the top menu choose "Open" under "File".
• Click "Browse" in the box that appears.
• Now find your HTML document and click "Open".

It now should say "Hurrah! This is my first website." in your browser. Congratulations!
If you absolutely want the whole world to see your masterpiece right away, you can jump to Lesson 13 and learn how to upload your page to the Internet. Otherwise, be patient and read on. The fun has just begun.
What have you learned so far?
Always start with the basic template we made in the previous lesson:

<html>
<head>
<title></title>
</head>

<body>
</body>

</html>

In the head section, always write a title: <title>The title of your page</title>. Notice how the title will be shown in the upper left corner of your browser:

The title is especially important because it is used by search engines (such as Google) to index your website and is shown in the search results.

In the body section, you write the actual content of the page. You already know some of the most important elements:

<p>Is used for paragraphs.</p>
<em>Emphasis text.</em>
<h1>Heading</h1>
<h2>Subhead</h2>
<h3>Sub-subhead</h3>

Remember, the only way to learn HTML is by trial and error. But don't worry, there is no way you can destroy your computer or the Internet. So keep experimenting - that is the best way to gain experience.
What is that supposed to mean?
Nobody becomes a good website creator by learning the examples in this tutorial. What you get in this tutorial is simply a basic understanding of the building blocks - to become good you must use the building blocks in new and creative ways.
So, get out in the deep water and stand on your own two feet... Okay, maybe not. But give it a go and experiment with what you have learned.
So what's next?
Try to create a few pages yourself. For instance, make a page with a title, a heading, some text, a subhead and some more text. It is perfectly okay to look in the tutorial while you make your first pages. But later, see if you can do it on your own - without looking.

Lesson - 2
A few more elements
Did you manage to make a few pages on your own? If not, here is an example:

<html>

<head>
<title>My website</title>
</head>

<body>
<h1>A Heading</h1>
<p>text, text text, text</p>
<h2>Subhead</h2>
<p>text, text text, text</p>
</body>

</html>

Now what?
Now it is time to learn seven new elements.
In the same way you emphasise the text by putting it between the openning tag <em> and the closing tag </em>, you can give stronger emphasis by using the openning tag <strong> and the closing tag </strong>.
Example 1:

<strong>Stronger emphasis.</strong>

Will look like this in the browser:
Stronger emphasis.
Likewise, you can make your text smaller using small:
Example 2:

<small>This should be in small.</small>

Will look like this in the browser:
This should be in small.
Can I use several elements at the same time?
You can easily use several elements at the same time as long as you avoid overlapping elements. This is best illustrated by an example:
Example 3:
If you want to emphasise small text, it must be done like this:

<em><small>Emphasised small text</small></em>

And NOT like this:

<em><small>Emphasise small text</em></small>

The difference is that in the first example, we closed the tag we first opened last. This way we avoid confusing both ourselves and the browser.
More elements!
As mentioned in Lesson 3 there are elements which are opened and closed in the same tag. These so-called empty elements are not connected to a specific passage in the text but rather are isolated labels. An example of such a tag is <br /> which creates a forced line break:
Example 4:

Some text<br /> and some more text in a new line

Will look like this in the browser:
Some text
and some more text in a new line
Notice that the tag is written as a contraction of an opening and closing tag with an empty space and a forward slash at the end: <br />.
Another element that is opened and closed in the same tag is <hr /> which is used to draw a horizontal line ("hr" stands for "horizontal rule"):
Example 5:

<hr />

Will look like this in the browser:
________________________________________
Examples of elements that needs both an opening tag and a closing tag - as most elements do - is ul, ol and li. These elements are used when you want to make lists.
ul is short for "unordered list" and inserts bullets for each list item. ol is short for "ordered list" and numbers each list item. To make items in the list use the li tag ("list item"). Confused? See the examples:
Example 7:

<ul>
<li>A list item</li>
<li>Another list item</li>
</ul>

will look like this in the browser:
• A list item
• Another list item
Example 8:

<ol>
<li>First list item</li>
<li>Second list item</li>
</ol>

will look like this in the browser:
1. First list item
2. Second list item
Phew! Is that all?
That is all for now. Again, experiment and make your own pages using some of the seven new elements you learned in this lesson:

<strong>Stronger emphasis</strong>
<small>Small text</small>
<br /> Line shift
<hr /> Horizontal line
<ul>List</ul>
<ol>Ordered list</ol>
<li>List item</li>


Attributes
You can add attributes to a number of elements.
What is an attribute?
As you probably remember, elements give structure to a HTML document and tells the browser how you want your website to be presented (for example, <br /> informs the browser to make a line break). In some elements you can add more information. Such additional information is called an attribute.
Example 1:

<h2 style="background-color:#ff0000;">My friendship with HTML</h2>

Attributes are always written within a start tag and are followed by an equals sign and the attribute details written between inverted commas. The semicolon after the attribute is for separating different style commands. We will get back to that later.
What is the catch?
There are many different attributes. The first one you will learn is style. With the style attribute you can add layout to your website. For instance a background colour:
Example 2:

<html>

<head>
</head>

<body style="background-color:#ff0000;">
</body>

</html>

will show a completely red page in the browser - go ahead and see for yourself. We will explain in greater detail how the colour system works in a few moments.
Note that some tags and attributes use US spelling i.e. color instead of colour. It is important that you are careful to use the same spelling as we use in the examples in this tutorial - otherwise, browsers will not be able to understand your codes. Also, don't forget to always close the inverted commas after an attribute.
How did the page become red?
In the above example, we asked for the background colour with the code "#ff0000". This is the colour code for red using so called hexadecimal numbers (HEX). Each colour has its own hexadecimal number. Here are some examples:
White: #ffffff
Black: #000000 (zeros)
Red: #ff0000
Blue: #0000ff
Green: #00ff00
Yellow: #ffff00
A hexadecimal colour code consists of # and six digits or letters. There are more than 1000 HEX codes and it is not easy to figure out which HEX code is tied to a specific colour. To make it easier we have made a chart of the 216 most commonly used colours: 216 Web Safe Colour Chart.
You can also use the English name for the most common colours (white, black, red, blue, green and yellow).
Example 3:

<body style="background-color: red;">

Enough about colours. Let's get back to the attributes.
Which elements can use attributes?
Different attributes can be applied to most elements.
You will often use attributes in tags such as the body tag while you will rarely use attributes in, for example, a br tag since a line break normally is a line break without any parameters to adjust.
Just as there are many different elements, so there are many different attributes. Some attributes are tailor made for one particular element while others can be used for many different element. And vice versa: some elements can only contain one kind of attribute while others can contain many.
It may sound a bit confusing but once you get acquainted with the different attributes it is actually very logical and you will soon see how easy they are to use and how many possibilities they provide.
This tutorial will introduce you to the most important attributes.
Exactly what parts does an element consist of?
Generally an elements consist of a start tag with or without one or more attributes, some content and an end tag. Simple as that. See the illustration below.

Links
In this lesson, you will learn how to make links between pages.
What do I need to make a link?
To make links, you use what you always use when coding HTML: an element. A simple element with one attribute and you will be able to link to anything and everything. Here is an example of what a link to HTML1.in could look like:
Example 1:

<a href="http://www.HTML1.in/">Here is a link to HTML1.in</a>

Would look like this in the browser:
Here is a link to HTML1.in
The element a stands for "anchor". And the attribute href is short for "hypertext reference", which specifies where the link leads to - typically an address on the internet or a file name.
In the above example the attribute href has the value "http://www.HTML1.in", which is the full address of HTML1.in and is called a URL (Uniform Resource Locator). Note that "http://" must always be included in URLs. The sentence "Here is a link to HTML1.in" is the text that is shown in the browser as the link. Remember to close the element with an </a>.
What about links between my own pages?
If you want to make a link between pages on the same website, you do not need to spell out the entire address (URL) for the document. For example, if you have made two pages (let us call them page1.htm and page2.htm) and saved them in the same folder you can make a link from one page to the other by only typing the name of the file in the link. Under such circumstances a link from page1.htm to page2.htm could look like this:
Example 2:

<a href="page2.htm">Click here to go to page 2</a>

If page 2 were placed in a subfolder (named "subfolder"), the link could look like this:
Example 3:

<a href="subfolder/page2.htm">Click here to go to page 2</a>

The other way around, a link from page 2 (in the subfolder) to page 1 would look like this:
Example 4:

<a href="../page1.htm">A link to page 1</a>

"../" points to the folder one level up from position of the file from which the link is made. Following the same system, you can also point two (or more) folders up by writing "../../".
Did you understand the system? Alternatively, you can always type the complete address for the file (URL).
What about internal links within a page?
You can also create internal links within a page - for example a table of contents at the top with links to each chapter below. All you need to use is a very useful attribute called id (identification) and the symbol "#".
Use the id attribute to mark the element to which you want to link. For example:

<h1 id="heading1">heading 1</h1>

You can now create a link to that element by using "#" in the link attribute. The "#" must be followed by the id of the tag you want to link to. For example:

<a href="#heading1">Link to heading 1</a>

All will become clear with an example:
Example 5:

<html>

<head>
</head>

<body>

<p><a href="#heading1">Link to heading 1</a></p>
<p><a href="#heading2">Link to heading 2</a></p>

<h1 id="heading1">heading 1</h1>
<p>Text text text text</p>

<h1 id="heading2">heading 2</h1>
<p>Text text text text</p>

</body>

</html>

will look like this in the browser (click on the two links):
Link to heading 1
Link to heading 2
Heading 1
Text text text text
Heading 2
Text text text text
(Note: An id attribut must start with a letter)
Can I link to anything else?
You can also make a link to an e-mail address. It is done in almost the same way as when you link to a document:
Example 6:

<a href="mailto:nobody@HTML1.in">Send an e-mail to nobody at HTML1.in</a>

will look like this in the browser:
Send an e-mail to nobody at HTML1.in
The only difference between a link to an e-mail and a link to a file is that instead of typing the address of a document, you type mailto: followed by an e-mail address. When the link is clicked, the default e-mail program opens with a new blank message addressed to the specified e-mail address. Please note that this function will only work if there is an e-mail program installed on your computer. Give it a try!
Are there any other attributes I should know of?
To create a link, you always have to use the href attribute. In addition, you can also put a title on your link:
Example 7:

<a href="http://www.HTML1.in/" title="Visit HTML1.in and learn HTML">HTML1.in</a>

Would look like this in the browser:
HTML1.in
The title attribute is used to type a short description of the link. If you - without clicking - place the cursor over the link, you will see the text "Visit HTML1.in and learn HTML" appears.
Images
Wouldn't it be great if you could have an image of actor and music legend David Hasselhoff right in the centre of your page?
That sounds like a bit of a challenge...
Maybe, but in fact it is pretty easy to do. All you need is an element:
Example 1:

<img src="david.jpg" alt="David" />

would look like this in the browser:

All you need do is first tell the browser that you want to insert an image (img) and then where it is located (src, short for "source"). Do you get the picture?
Notice how the img element is opened and closed using the same tag. Like the <br /> tag, it is not tied to a piece of text.
"david.jpg" is the name of the image file you want to insert in your page. ".jpg" is the file type of the image. Just like the extension ".htm" shows that a file is an HTML document, ".jpg" tells the browser that a file is a picture. There are three different types of image file types you can insert into your pages:
• GIF (Graphics Interchange Format)
• JPG / JPEG (Joint Photographic Experts Group)
• PNG (Portable Network Graphics)
GIF images are usually best for graphics and drawings, while JPEG images are usually better for photographs. This is for two reasons: first, GIF images only consist of 256 colours, while JPEG images comprise of millions of colours and second, the GIF format is better at compressing simple images, than the JPEG format which is optimized for more complex images. The better the compression, the smaller the size of the image file, the faster your page will load. As you probably know from your own experience, unnecessarily 'heavy' pages can be extremely annoying for the user.
Traditionally, the GIF and JPEG formats have been the two dominant image types, but lately, the PNG format has become more and more popular (primarily at the expense of the GIF format). The PNG format contains in many ways the best of both the JPEG and GIF format: millions of colours and effective compressing.
Where do I get my images from?
To make your own images, you need an image editing program. An image editing program is one of the most essential tools you need to create beautiful websites.
Unfortunately, no good image editing programs comes with Windows or other operating systems. Thus, you might consider investing in either Paint Shop Pro, PhotoShop or Macromedia Fireworks, which are three of the best image editing programs currently on the market.
However, as we said before, it will not be necessary to buy expensive programs to complete this tutorial. For now, you can download the excellent image editing program IrfanView which is so-called freeware and therefore costs nothing.
Or you can just borrow images from other sites by downloading them. But please be careful not to violate copyrights when downloading pictures. Still, it's useful to know how to download pictures, so here's how you do it:
1. Right-click on an image on any image on the Internet.
2. Choose "Save picture as..." in the menu that appears.
3. Choose a location for the image on your computer and press "Save".
Do this with the image below and save it on your computer at the same location as your HTML documents. (Notice that the logo is saved as a PNG file: logo.png):

Now you can insert the image into one of your own pages. Try it yourself.
Is that all I need to know about images?
There are a few more things you should know about images.
First, you can easily insert pictures located in other folders, or even pictures that are located on other websites:
Example 2:

<img src="images/logo.png" />

Example 3:

<img src="http://www.HTML1.in/logo.png" />

Second, images can be links:
Example 4:

<a href="http://www.HTML1.in">
<img src="logo.png" /></a>

will look like this in the browser (try clicking on the image):

Are there any other attributes I should know about?
You always need to use the attribute src, which tells the browser where the image is located. Besides that, there are a number of other attributes which can be useful when inserting images.
The alt attribute is used to give an alternate description of an image if, for some reason, the image is not shown for the user. This is especially important for users with impaired vision, or if the page is loaded very slowly. Therefore, always use the alt attribute:
Example 5:

<img src="logo.gif" alt="HTML1.in logo" />

Some browsers let the text of the alt attribute appear as a small pop-up box when the user places their cursor over the picture. Please note that when using the alt attribute, the aim is to provide an alternative description of the picture. The alt attribute should not be used to create special pop-up messages for the user since then visually impaired users will hear the message without knowing what the picture is.
The title attribute can be used to add information to the image:
Example 6:

<img src="logo.gif" title="Learn HTML from HTML1.in" />

Will look like this in the browser:

If you, without clicking, place the cursor over the image, you will see the text "Learn HTML from HTML1.in" appear as a pop-up box.
Two other important attributes are width and height:
Example 7:

<img src="logo.png" width="141px" height="32px" />

will look like this in the browser:

The width and height attributes can be used to set the height and width of an image. The value that is used to set the width and height is pixels. Pixels are the units of measurement used to measure the resolution of screens. (The most common screen resolution is 1024x768 pixels). Unlike centimetres, pixels are relative units of measurement which depend on the resolution of the screen. To a user with a high screen resolution, 25 pixels may correspond to 1 centimetre, while the same 25 pixel in a low screen resolution may correspond to 1.5 centimetres on the screen.
If you do not set the width and height, the image will be inserted in its actual size. But with width and height you can manipulate the size:
Example 8:

<img src="logo.gif" width="32px" height="32px" />

will look like this in the browser:

However, it is worth keeping in mind that the actual size in kilobytes of the image file will remain the same so it will take the same time to load the image as it did before, even though it appears smaller on the screen. Therefore, you should never decrease the image size by using the width and height attributes. Instead, you should always resize your images in an image editing program to make your pages lighter and faster.
That said, it is still a good idea to use the width and height attributes because the browser will then be able to detect how much space the image will need in the final page layout before the image is fully downloaded. This allows your browser to set up the page nicely in a quicker way.
Tables
Last edited by Alf82 Mon, 10/20/2008 - 22:01

Use of tables in modern web design is a controversial topic, but even today tables have their uses. As a rule, tables need to be used for tabular data, but still you will see the occasional use as a layout helper.



Creating tables
A simple two-by-two cell table is created using the following syntax:
<table height="100px" width="300px" border=1>

<tr>
<td>This is cell 1</td>
<td>This is cell 2</td>
</tr>

<tr>
<td> This is cell 3</td>
<td> This is cell 4</td>
</tr>

</table>
The result looks like this:


Tables always begin with <table>, followed by the <tr> tag. <tr> stands for table row; the first <tr>creates horizontal row, and within that you create your table cells, using <td> tags. By default the border attribute is set to 0 and is therefore invisible; the higher values you specify, the thicker your table border will be.
Height and width
A table's height and width can be expressed as either pixels or percent. A table with width="100%" will span the entire width of browser window (or the parent element), width="50%" means it will be half as wide, etc.
A practical application: let us suppose that you need a table with three columns, with the first column twice as wide as the other two. You need to do this:
<table border=1 width="500px">
<tr>

<td width="50%">This is column one</td>
<td width="25%">This is column two</td>
<td width="25%">This is column three</td>

</tr>

</table>
The result is the table pictured below: the first column is 50% of 500 pixels, or 250 pixels, while the other two are half as wide. Note that when height (or width) is left unspecified, the table is auto-sized according to the content within it.

The border, cellspacing, and cellpadding attributes
Using different values for border, cellspacing, and cellpadding, you have control over the look of the table.
Border specifies whether your table will have a line around it.
Cellspacing determined the distance between table cells, while cellpadding is the distance (in pixels, for example), between content within the cell and the cell's outer borders.
Cellspan and collspan
The colspan and rowspan attributes are used in order to make table cell span up more than one column or one row.
‹ Advanced HTMLupForms ›



What HTML forms do
Once you master forms, you will be able to do receive user input. In the majority of cases forms are used together with a separate PHP or CGI script. Using HTML you determine how a feedback or registration page will look like; the dynamic scripts process the provided information. In order for a web form to work, both its parts -- HTML and script, must be done properly, which means that the HTML code has to be correct, and the server needs to be configured to run scripts.
Creating forms
The form itself is an area that contains form elements. It has the following basic syntax:
<form>
<input ...>
</form>
Input types
Different input types are used in different situations.
Text field
Text fields are used when the user has to type some information.
<form>
Name:
<input type="text" name="my_name">
</form>

The above code renders as:

Name:

Checkbox
<form>
I like pie:
<input type="checkbox" name="taste" value="pie" />
<br />
I like chocolate:
<input type="checkbox" name="taste" value="chocolate" />
</form>

The above code renders as:

I like pie:


I like chocolate:

Several options can be selected from a list.
Radio button
Unlike checkboxes, radio buttons allow for choosing one option only.
<form>
<input type="radio" name="opinion" value="agree"> I agree.
<br>
<input type="radio" name="opinion" value="disagree"> I disagree.
</form>
I agree.


I disagree.
The submit button
Most often, the script associated with an HTML form is invoked with a "Submit" button. Pressing the button sends the information from the form to another file, which then processes it.

<form name="input" action="mail.php"
method="get">
Enter email to subscribe to our newsletter:
<input type="text" name="subscribe">
<input type="submit" value="Subscribe">
</form>

method="get">
Enter email to subscribe to our newsletter: