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HTML Essential Training
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Using images


From:

HTML Essential Training

with Bill Weinman

Video: Using images

Images are a major part of most website designs. While the web is not exclusively a visual medium, it is primarily so and images are a valuable part of that equation. Let's make a working copy of images.html and I am going to call this images-working.html and open it in my text editor, and you see here here's the whole file. It's got some Lorem Ipsum in it and it has here, starting on line 17, an image tag and let's go through that image tag real quick.
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  1. 5m 24s
    1. Welcome
      56s
    2. Using the exercise files
      1m 37s
    3. What you need to know about this course
      2m 51s
  2. 22m 0s
    1. What is HTML?
      4m 12s
    2. Examining the structure of an HTML document
      7m 50s
    3. Understanding tags and containers
      6m 4s
    4. Exploring content models in HTML5
      2m 23s
    5. Looking at obsolete elements
      1m 31s
  3. 27m 19s
    1. Understanding whitespace and comments
      3m 53s
    2. Displaying text with paragraphs
      3m 37s
    3. Applying style
      8m 5s
    4. Using block and inline tags
      6m 34s
    5. Displaying characters with references
      5m 10s
  4. 16m 36s
    1. Exploring the front matter of HTML
      2m 9s
    2. Applying CSS to your document
      3m 59s
    3. Adding scripting elements
      4m 54s
    4. Using the meta tag
      3m 34s
    5. Optimizing your page for search engines
      2m 0s
  5. 24m 59s
    1. Controlling line breaks and spaces
      2m 46s
    2. Exploring phrase elements
      1m 44s
    3. Using font markup elements
      1m 5s
    4. Highlighting text with mark
      1m 29s
    5. Adding headings
      1m 38s
    6. Using quotations and quote marks
      3m 2s
    7. Exploring preformatted text
      1m 45s
    8. Formatting lists
      2m 28s
    9. Forcing text direction
      3m 49s
    10. Suggesting word-break opportunities
      2m 29s
    11. Annotating East Asian languages
      2m 44s
  6. 29m 15s
    1. Introducing CSS
      55s
    2. Understanding CSS placement
      6m 55s
    3. Exploring CSS syntax
      10m 34s
    4. Understanding CSS units of measure
      3m 3s
    5. Some CSS examples
      7m 48s
  7. 22m 5s
    1. Using images
      4m 13s
    2. Flowing text around an image
      4m 55s
    3. Breaking lines around an image
      3m 3s
    4. Aligning images
      5m 25s
    5. Mapping links in an image
      4m 29s
  8. 22m 28s
    1. Understanding URLs
      2m 41s
    2. Working with hyperlinks
      3m 28s
    3. Using relative URLs
      4m 20s
    4. Specifying a base URL
      2m 19s
    5. Linking within a page
      4m 12s
    6. Using image links
      5m 28s
  9. 17m 2s
    1. Exploring list types
      3m 52s
    2. List elements in depth
      7m 44s
    3. Using text menus with unordered lists
      5m 26s
  10. 15m 30s
    1. Introduction to HTML semantics
      4m 9s
    2. Exploring an example
      4m 56s
    3. Marking up figures and illustrations
      2m 33s
    4. Creating collapsible details
      3m 52s
  11. 11m 18s
    1. Embedding audio
      5m 19s
    2. Embedding video
      5m 59s
  12. 11m 53s
    1. Creating ad-hoc Document Object Model (DOM) data with the data-* attribute
      4m 53s
    2. Displaying relative values with meter
      2m 57s
    3. Creating dynamic progress indicators
      4m 3s
  13. 4m 49s
    1. Overview of HTML5 microdata
      1m 8s
    2. Exploring an example with microdata
      3m 41s
  14. 7m 3s
    1. Understanding outlines
      52s
    2. A demonstration of outlining
      6m 11s
  15. 13m 1s
    1. Table basics
      7m 29s
    2. Exploring the semantic parts of a table
      2m 32s
    3. Grouping columns
      3m 0s
  16. 9m 55s
    1. Frames overview
      54s
    2. Using traditional frames
      4m 26s
    3. Exploring inline frames using iframe
      2m 7s
    4. Simulating frames with CSS
      2m 28s
  17. 53m 7s
    1. Introducing forms
      10m 24s
    2. Using text elements
      10m 12s
    3. Using checkboxes and radio buttons
      2m 37s
    4. Creating selection lists and dropdown lists
      5m 14s
    5. Submit and button elements
      8m 48s
    6. Using an image as a submit button
      2m 15s
    7. Keeping context with the hidden element
      3m 0s
    8. Setting tab order
      2m 7s
    9. Preloading an autocomplete list using the datalist feature
      5m 26s
    10. Displaying results with output
      3m 4s
  18. 19m 47s
    1. Touring a complete site
      2m 14s
    2. Touring the HTML
      8m 44s
    3. Touring the CSS
      8m 49s
  19. 29s
    1. Goodbye
      29s

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HTML Essential Training
5h 34m Beginner Sep 11, 2012

Viewers: in countries Watching now:

This course introduces web designers to the nuts and bolts of HTML (HyperText Markup Language), the programming language used to create web pages. Author Bill Weinman explains what HTML is, how it's structured, and presents the major tags and features of the language. Discover how to format text and lists, add images and flow text around them, link to other pages and sites, embed audio and video, and create HTML forms. Additional tutorials cover the new elements in HTML5, the latest version of HTML, and prepare you to start working with Cascading Style Sheets (CSS).

Topics include:
  • What is HTML?
  • Using HTML tags and containers
  • Understanding block vs. inline tags
  • Controlling line breaks and spaces in text
  • Aligning images
  • Linking within a page
  • Using relative links
  • Working with tables
  • Creating progress indicators with HTML5
  • Adding buttons and check boxes to forms
  • Applying CSS
  • Optimizing your pages for search engines
  • Building document outlines
Subjects:
Developer Web Web Foundations Web Development
Software:
HTML
Author:
Bill Weinman

Using images

Images are a major part of most website designs. While the web is not exclusively a visual medium, it is primarily so and images are a valuable part of that equation. Let's make a working copy of images.html and I am going to call this images-working.html and open it in my text editor, and you see here here's the whole file. It's got some Lorem Ipsum in it and it has here, starting on line 17, an image tag and let's go through that image tag real quick.

It has several attributes. It starts with a source attribute, s-r-c, and it tells the browser the source of the image, where to go on the server to pick up the image, and in this case, it has a relative URL. We'll talk about relative URLs in the next chapter, but this basically specifies a subdirectory called images and a file in that subdirectory called scissors.png, and this image has a width of 240 pixels and a height of 240 pixels.

I always specify the width and the height of an image and I'll tell you why. If you're on a slow Internet connection, and I have to assume that some of the people that come to visit my websites will be on a slow Internet connection. It may load the page and then it may take it a while to get around to load in the images and when it does load the images, then the page can jump around as it figures out the size of the spaces that are going to be required for the various images. And you'll see text shift this way and that way and you might even be trying to click on a link and it jumps out of the way under your mouse or another link jumps in the way, and all of a sudden you are clicking on something you didn't mean to and you have to go back and wait all over again for the page to load.

It can be a problem and when you specify the width and the height of all of the objects on your page, then as soon as the HTML is loaded, the browser knows how to lay out the page, in most cases it will go ahead and do that and as the images fill in, things won't jump around as much. And so I always specify the width and height of my images for that reason. Next, we see the Alt attribute and the Title attribute, and the Alt attribute is text that will display if the browser is not able to load the image, or if the browser is able to load the image, but it takes a while for it to get around to it, and the title attribute specifies text that will show up in a tooltip, when you hover your mouse over the image.

Let's go ahead and load this page up in our browser, load it in Firefox here, and there is the picture of a pair of scissors, and you will notice when I hover my cursor over the image, I get a little tooltip that says running with these is not recommended, and if we look in our source code here, you see the title attribute "Running with these is not recommended." I put that TITLE attribute in capitals. I usually do that in lower case. Of course this is HTML and either is acceptable. I may save it this way so it may show up in lowercase on your computer when you load the exercise files.

But you see that title says "Running with these is not recommended" and that's the text that shows up when I hover my cursor over these scissors. So it's important to understand the distinction between the Alt attribute and the Title attribute. The alt attribute is what shows up when the image can't be loaded. If I just misspell the name of this file here, I'll put an extra s in it and reload this, you'll see that the image doesn't show up because it can't load it. It doesn't have the right file name and instead this alt text shows up and actually if I hover my cursor over that, I still get the title text.

And so that's the purpose of Alt text. If for some reason the image is not available or for browsers that aren't visual browsers for people that are visually impaired, then that Alt text will be displayed or read or in some way given to the user. The Title attribute on the other hand is for this extra information and in this case it shows up in a tooltip and that's how it works on most visual browsers. So HTML's image tag is both simple and powerful. We'll cover much more about HTML's image related features in the rest of this chapter.

Find answers to the most frequently asked questions about HTML Essential Training.


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Q: The horizontal nab bar built in Chapter 8 doesn't work correctly in Internet Explorer 8. Do you have a solution?
A: Internet Explorer 8 does not support HTML5 and the NAV element.

The nab bar can work in IE 8 if you change the nav element to div, and update the CSS accordingly. You will also need to move the "display: inline" from the "ul.menu li a" rule to the "ul.menu li" rule.
 
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