HTML IMAGES

HTML Images


With HTML you can display images in a document.

The Image Tag and the Src Attribute

In HTML, images are defined with the <img> tag. 
The <img> tag is empty, which means that it contains attributes only and it has no closing tag.
To display an image on a page, you need to use the src attribute. Src stands for "source". The value of the src attribute is the URL of the image you want to display on your page.
The syntax of defining an image:
<img src="url">
The URL points to the location where the image is stored. An image named "boat.gif" located in the directory "images" on "www.w3schools.com" has the URL: http://www.w3schools.com/images/boat.gif.
The browser puts the image where the image tag occurs in the document. If you put an image tag between two paragraphs, the browser shows the first paragraph, then the image, and then the second paragraph.

The Alt Attribute

The alt attribute is used to define an "alternate text" for an image. The value of the alt attribute is an author-defined text: 
<img src="boat.gif" alt="Big Boat">
The "alt" attribute tells the reader what he or she is missing on a page if the browser can't load images. The browser will then display the alternate text instead of the image. It is a good practice to include the "alt" attribute for each image on a page, to improve the display and usefulness of your document for people who have text-only browsers.

Basic Notes - Useful Tips

If an HTML file contains ten images - eleven files are required to display the page right. Loading images take time, so my best advice is: Use images carefully.

Image Tags

Tag
Description
<img>
Defines an image
<map>
Defines an image map
<area>
Defines a clickable area inside an image map


HTML Backgrounds


A good background can make a Web site look really great.

Backgrounds

The <body> tag has two attributes where you can specify backgrounds. The background can be a color or an image.

Bgcolor

The bgcolor attribute specifies a background-color for an HTML page. The value of this attribute can be a hexadecimal number, an RGB value, or a color name:
<body bgcolor="#000000">
<body bgcolor="rgb(0,0,0)">
<body bgcolor="black">
The lines above all set the background-color to black. 

Background

The background attribute specifies a background-image for an HTML page. The value of this attribute is the URL of the image you want to use. If the image is smaller than the browser window, the image will repeat itself until it fills the entire browser window.
<body background="clouds.gif">
<body background="http://www.w3schools.com/clouds.gif">
The URL can be relative (as in the first line above) or absolute (as in the second line above).
Note: If you want to use a background image, you should keep in mind:
  • Will the background image increase the loading time too much?
  • Will the background image look good with other images on the page?
  • Will the background image look good with the text colors on the page?
  • Will the background image look good when it is repeated on the page?
  • Will the background image take away the focus from the text?

Basic Notes - Useful Tips

The bgcolor, background, and the text attributes in the <body> tag are deprecated in the latest versions of HTML (HTML 4 and XHTML). The World Wide Web Consortium (W3C) has removed these attributes from its recommendations.
Style sheets (CSS) should be used instead (to define the layout and display properties of HTML elements).

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