Learning HTML w3schools

Learning HTMLhttp://www.w3schools.com

Internet and Web Application DevelopmentSWE 444

Dr. Ahmed Youssef

http://www.w3schools.com/

Introduction

HTML is a language for describing web pages.HTML stands

for Hyper Text Markup LanguageHTML is not a programming language, it is

a markup languageA markup language is a set of markup tagsHTML uses markup tags to describe web

pagesAhmed Youssef:: SWE444: Internet and Web Application Development

HTML Tags

HTML tags are keywords surrounded by angle brackets like <html>HTML tags normally come in pairs like <b>

and </b>The first tag in a pair is the start tag, the

second tag is the end tag

Ahmed Youssef:: SWE444: Internet and Web Application Development

html

bodyhead

title ph1 p h2 ul

lili li

text text text text text

text text text

Web Page

HTML Basic Document

Open and close HTML document <html> … </html>Enclose document header <head> … </head>Contain the document’s assigned title. <title> … </title>Contain the body of the HTML document. <body> … </body>

<html><head><title>Title of document goes here</title></head><body> Visible text goes here…</body></html>


Example Explained

The text between <html> and </html> describes the web pageThe text between <body> and </body> is the

visible page contentThe text between <h1> and </h1> is displayed

as a headingThe text between <p> and </p> is displayed as

a paragraphAhmed Youssef:: SWE444: Internet and Web Application Development

Heading Elements

<h1>Largest Heading</h1><h2> . . . </h2><h3> . . . </h3><h4> . . . </h4><h5> . . . </h5><h6>Smallest Heading</h6>


Heading Elements

<html><body>

<h1>This is heading 1</h1><h2>This is heading 2</h2><h3>This is heading 3</h3><h4>This is heading 4</h4><h5>This is heading 5</h5><h6>This is heading 6</h6>

</body></html>

Paragraphs

Paragraphs are defined with the <p> tag.

<html><body><p>This is a paragraph.</p><p>This is a paragraph.</p><p>This is a paragraph.</p>

</body></html>


HTML Links

HTML links are defined with the <a> tag.The href attribute specifies the destination of a link.

Example<html>

<body><a href="http://www.w3schools.com">This is a link</a></body>

</html>Ahmed Youssef:: SWE444: Internet and Web Application Development

HTML Comments

Comments can be inserted into the HTML code to make it more readable and understandable. Comments are ignored by the browser and

are not displayed.Comments are written like this:




HTML LinesThe <hr /> tag creates a horizontal line in an HTML page.

<html><body>

<p>The hr tag defines a horizontal rule:</p><hr /><p>This is a paragraph</p><hr /><p>This is a paragraph</p><hr />

</body></html> Ahmed Youssef:: SWE444: Internet and Web Application Development

HTML Line Breaks

Use the <br /> tag if you want a line break (new line) without starting a new paragraphExample<html><body> <p>Welcome in Hail </p> <p>Welcome<br />in <br />Hail</p></body></html>


HTML Text Formatting

Tag Description<b> bold text<big> big text<i> italic text<small> small text<strong> strong text<sub> subscripted text<sup> superscripted text


Exapmle

<html><body><p><b>This text is bold</b></p><p><strong>This text is strong</strong></p><p><i>This text is italic</i></p><p>This is<sub> subscript</sub> and

<sup>superscript</sup></p></body></html>

Preserving Whitespace

<pre>class Foo{ static void main(string[] args) { return; }}</pre>

vs

HTML Images

In HTML, images are defined with the <img> tag.To display an image on a page, you need to use

the src attribute.

<img src="/images/pulpit.jpg" border=“0" width="304" height="228" />

Ahmed Youssef:: SWE444: Internet and Web Application Development 17

Images

WIDTH="..." The width in pixels of an image. HEIGHT="..." The height in pixels of the

image. BORDER="..." Creates a border around image.



<img src="../images/bird.jpg" alt="Magpie picture" width="200px"/>

(Relative) URL of the binary

image file

Alternative textto be displayed

if the image can't be displayedwidth and/or height

attributes used to scale the rendered size of the image

HTML Lists

Ordered list:1.The first list item2.The second list item3.The third list item

Unordered list:• List item• List item• List item

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Definition Listslist of items, with a description of each item.Coffee - black hot drinkMilk - white cold drink

HTML List TagsTag Description<ol> Defines an ordered list<ul> Defines an unordered list<li> Defines a list item<dl> Defines a definition list<dt> Defines an item in a definition list<dd> Defines a description of an item in a

definition list

HTML List Tags

http://www.w3schools.com/tags/tag_ol.asp



http://www.w3schools.com/tags/tag_ul.asp

http://www.w3schools.com/tags/tag_li.asp

http://www.w3schools.com/tags/tag_dl.asp

http://www.w3schools.com/tags/tag_dt.asp

http://www.w3schools.com/tags/tag_dd.asp



ListsUnordered Lists

>ul<> li>First Item</li<

> li>Another item</li</>ul<

Ordered Lists>ol<

> li>First Item</li<> li>Second Item</li<

/>ol<Definition Lists

>dl<> dt>job</dt <

> dd>a piece of work</dd<>dt>spade</dt<

>dd>a tool for digging</dd</>dl<

Numbered List<html><body>

<h4>Numbered list:</h4><ol>

< li>Apples</li>< li>Bananas</li>< li>Lemons</li>< li>Oranges</li>

/<ol></html></body>


<h4>Letters list:</h4><ol type="A">


</ol>

<h4>Lowercase letters list:</h4><ol type="a">

<li>Apples</li>< li>Bananas</li>< li>Lemons</li>< li>Oranges</li>

</ol> Ahmed Youssef:: SWE444: Internet and Web Application Development

<h4>Roman numbers list:</h4><ol type="I">


</ol>

<h4>Lowercase Roman numbers list:</h4><ol type="i">


</ol>


Different types of unordered lists

<html><body><h4>Disc list:</h4><ul type="disc">


</ul> </html></body>

>h4<Circle bullets list:>/h4<>ul type="circle"< >li<Apples>/li< >li<Bananas>/li< >li<Lemons>/li< >li<Oranges>/li<>/ul<

>h4<Square bullets list:>/h4<>ul type="square"< >li<Apples>/li< >li<Bananas>/li< >li<Lemons>/li< >li<Oranges>/li<>/ul<

HTML Tables

Tables are defined with the <table> tag.A table is divided into rows (with the <tr> tag),

data cells (with the <td> tag). td stands for "table data," and holds the content of a data cell.

<td> tag can contain text, links, images, lists, forms, other tables, etc.

Example

<table border="1"><tr> <td>row 1, cell 1</td> <td>row 1, cell 2</td></tr><tr> <td>row 2, cell 1</td> <td>row 2, cell 2</td></tr></table>

HTML Table Headers<table border="1">

<tr><th>Header 1</th><th>Header 2</th>

</tr><tr>

<td>row 1, cell 1</td><td>row 1, cell 2</td>

</tr><tr>

<td>row 2, cell 1</td><td>row 2, cell 2</td>

</tr></table>

Vertical Headers

<table border="1"><tr> <th>First Name:</th> <td>Bill Gates</td>

</tr><tr> <th>Telephone:</th> <td>555 77 854</td>

</tr>

<tr> <th>Telephone:</th> <td>555 77 855</td>

</tr></table>

Tables<table border="2"> <caption>Fruit Juice Drinks</caption> <tr> <th></th> <th> Apple </th> <th> Orange </th> </tr> <tr> <th> Breakfast </th> <td> 0 </td> <td> 1 </td> </tr> <tr> <th> Lunch </th> <td> 1 </td> <td> 2 </td> </tr></table>

HTML Styles - Background Color


HTML List Tags

<html><body style="background-

color:yellow"><h2 style="background-color:red">This is a heading</h2><p style="background-color:green">This is a paragraph.</p></body>

</html>

HTML Style Font, Color and Size

>h1 style="font-family:verdana"<A heading>/h1<>p style="font-family:arial;color:red;font-

size:20;"< A paragraph.>/p<


HTML Style - Text Alignment

<h1 style="text-align:center">This is a heading</h1><p>The heading above is aligned to the center </p>


HTML Forms

HTML forms are used to pass data to a server.A form can contain input elements like text

fields, checkboxes, radio-buttons, submit buttons and more. A form can also contain select lists, textarea,

fieldset, legend, and label elements.

HTML Form TagsDescription Tag

Defines an HTML form for user input <form>

Defines an input control <input />

Defines a multi-line text input control <textarea>

Defines a label for an input element <label>

Defines a border around elements in a form <fieldset>

Defines a select list (drop-down list) <select>

Defines an option in a select list <option>

Defines a push button <button>

http://www.w3schools.com/tags/tag_form.asp

http://www.w3schools.com/tags/tag_input.asp

http://www.w3schools.com/tags/tag_textarea.asp

http://www.w3schools.com/tags/tag_label.asp

http://www.w3schools.com/tags/tag_fieldset.asp

http://www.w3schools.com/tags/tag_select.asp

http://www.w3schools.com/tags/tag_option.asp

http://www.w3schools.com/tags/tag_button.asp

HTML Forms

The <form> tag is used to create an HTML form:

<form>.input elements.

</form>

HTML Forms - The Input Element• The input element is used to select user information.• An input element can be of type

– text field, – checkbox, – password, – radio button, – submit button, – and more.

type = text|password|checkbox|radio|submit| reset|button

Text Field

<form>First name: <input type="text"

name="firstname" /><br />

Last name: <input type="text" name="lastname" /></form>

Password Field

<form>Password: <input type="password" name="pwd" />

</form>

Radio Buttons

<input type="radio" /> defines a radio button. Radio buttons let a user select ONLY ONE of a

limited number of choices:<form>

<input type="radio" name=“Gender" value="male" /> Male<br /><input type="radio" name=" Gender " value="female" /> Female</form>

Submit Button

A submit button is used to send form data to a server. <form>Username: <input type="text" name="user" /><input type="submit" value="Submit" /></form>

Checkboxes

User can select ONE or MORE options<form>

<input type="checkbox" name="vehicle" value="Bike" /> I have a bike<br /><input type="checkbox" name="vehicle" value="Car" /> I have a car

</form>

Drop-Down List

<form ><select name="cars">

<option value="volvo">Volvo</option><option value="saab">Saab</option><option value="fiat">Fiat</option><option value="audi">Audi</option>

</select></form>

Text-area

To create a multi-line text input control. User can write an unlimited number of characters.

<textarea rows="10" cols="30"> The cat was playing in the garden. </textarea>

Create a button

<form ><input type="button" value="Hello world!"></form>


Last Lecture

ListTableStylesForms


HTML Forms - The Input Element

used to select user information.type = text | password | checkbox | radio |

submit | reset | button

Text-area

To create a multi-line text input control. User can write an unlimited number of characters.

<textarea rows="10" cols="30"> The cat was playing in the garden. </textarea>

Fieldset

Used to logically group together elements in a form.To draws a box around the related form

elements.

Fieldset - Example

<form><fieldset>

Name: <input type="text" size="30" /><br />Email: <input type="text" size="30" /><br />Date of birth: <input type="text" size="10" />

</fieldset></form>

Legend

Defines a caption for the fieldset element <form>

<fieldset> <legend align="right">Information:</legend> Name: <input type="text" size="30" /><br /> Email: <input type="text" size="30" /><br /> Date of birth: <input type="text" size="10" /> </fieldset></form>

Drop-Down List

<form ><select name="cars">

<option value="volvo">Volvo</option><option value="saab">Saab</option><option value="fiat">Fiat</option><option value="audi">Audi</option>

</select></form>

Create a button

<form ><input type="button" value= " I Agree">

</form>


Create a button

<button type="button">I Agree!</button>

HTML Frames

With frames, you can display more than one HTML document in the same browser window.

The HTML frameset Element

The frameset element holds one or more frame elements.The frameset element states HOW MANY columns or rows HOW MUCH percentage/pixels of space will

occupy each of them.

Vertical Frameset

<frameset cols="25%,50%,25%">

<frame src="frame_a.htm" /> <frame src="frame_b.htm" /> <frame src="frame_c.htm" />

</frameset>

frame_a.htm

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

<h3>Frame A</h3></body>

</html>

frame_b.htm

<html><body style="background-color: green" > <h3>Frame B</h3>

</body></html>

frame_c.htm

<html><body style="background-color: blue" >

<h3>Frame C</h3></body>

</html>

Horizontal Frameset

<frameset rows="25%, *, 25%">

<frame src="frame_a.htm" /> <frame src="frame_b.htm" /> <frame src="frame_c.htm" />

</frameset>

Nested Framesets

<frameset rows="50%,50%"> <frame src="frame_a.htm" />

<frameset cols="25%,75%"> <frame src="frame_b.htm" />

<frame src="frame_c.htm" /> </frameset>

</frameset>

tryhtml_contents.htm

<body><a href ="frame_a.htm" target ="showframe">Frame a</a><br /><a href ="frame_b.htm" target ="showframe">Frame b</a><br /><a href ="frame_c.htm" target ="showframe">Frame c</a></body>

Navigation Frame

<frameset cols="120,*">

<frame src="tryhtml_contents.htm" /> <frame src="frame_a.htm" name="showframe" />

</frameset>

Frameset with noresize

<frameset rows="50%,50%">

<frame noresize="noresize" src="frame_a.htm" /> <frame noresize="noresize" src="frame_b.htm" />

</frameset>

XHTML

What Is XHTML?

Stands for eXtensible HyperText Markup

Language

XHTML is a combination of HTML and XML

XHTML is almost identical to HTML 4.01

XHTML is a stricter and cleaner version of

HTML

XHTML is a W3C Recommendation

All browsers support XHTML

Bad HTML

<html><head>

<title>This is bad HTML</title>

<body><h1>Bad HTML<p>This is a paragraph

</body> Why?

Differences Between XHTML and HTML

XHTML elements must be properly nested

XHTML elements must always be closed

XHTML elements must be in lowercase

XHTML documents must have one root

element

XHTML elements must be properly nested

<ul> <li>Coffee</li> <li>Tea <ul> <li>Black tea</li> <li>Green tea</li> </ul> <li>Milk</li></ul>

<ul> <li>Coffee</li> <li>Tea <ul> <li>Black tea</li> <li>Green tea</li> </ul> </li> <li>Milk</li></ul>

XHTML Elements Must Always Be Closed

<p>This is a paragraph <p>This is another paragraph

<p>This is a paragraph</p> <p>This is another paragraph</p>

Attribute Names Must Be In Lower Case– This is wrong:

• <table WIDTH="100%">– This is correct:

• <table width="100%">Attribute Values Must Be Quoted

– This is wrong:• <table width=100%>

– This is correct:• <table width="100%">

Mandatory XHTML Elements

All XHTML documents must have:

a DOCTYPE declaration. The html, head, title, and body

Mandatory XHTML Elements

<!DOCTYPE ...> <html> <head>

<title>... </title></head><body> ... </body>

</html>

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HTML Document Type Declarations

XHTML 1.0 Strict:<!DOCTYPE htmlPUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"

"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

XHTML 1.0 Frameset:<!DOCTYPE htmlPUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN“"http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">

HTML 4.01 Transitional:<!DOCTYPE HTMLPUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN“"http://www.w3.org/TR/html4/loose.dtd">

SWE 444: Internet & Web Application Development

The 3 Document Type Definitions

XHTML 1.0 Strict Use this when you want really clean markup, free of presentational clutter.

Use this together with Cascading Style Sheets.XHTML 1.0 Transitional

Use this when you need to take advantage of HTML's presentational features and when you want to support browsers that don't understand Cascading Style Sheets.

XHTML 1.0 Frameset Use this when you want to use HTML Frames to partition the browser

window into two or more frames.

3.78

<!DOCTYPE htmlPUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

79

A Minimum XHTML Document Template

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE htmlPUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"

lang="en"> <head><title>... </title></head><body> ... </body></html>

SWE 444: Internet & Web Application Development

An XHTML Example• <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0

Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en" >

<head><title>simple document</title>

</head><body>

<p>a simple paragraph</p></body>

</html>80

Learning HTML w3schools

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