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Creating disjointed rollovers

From: Dreamweaver CS3 Essential Training

Video: Creating disjointed rollovers

In this movie we're going to create a bit more of a complex rollover, and specifically we're going to create what's sometimes called a "disjointed rollover", which isn't as painful as it may sound. A disjointed rollover happens when a user moves his, or her mouse over one image, and a completely different image on the page changes. It's called disjointed because you're affecting a different image than the one you're actually interacting with. So, what we're going to do in this movie is, make it so that when we rollover our navigation buttons here, not only will they change because of the simple rollovers we applied the previous movie, but also a completely different image on the page will change to something else as well. Initially this may look kind of complicated, but if you stick with me I think you'll see how easy this can be once you understand what's going on.

Creating disjointed rollovers

In this movie we're going to create a bit more of a complex rollover, and specifically we're going to create what's sometimes called a "disjointed rollover", which isn't as painful as it may sound. A disjointed rollover happens when a user moves his, or her mouse over one image, and a completely different image on the page changes. It's called disjointed because you're affecting a different image than the one you're actually interacting with. So, what we're going to do in this movie is, make it so that when we rollover our navigation buttons here, not only will they change because of the simple rollovers we applied the previous movie, but also a completely different image on the page will change to something else as well. Initially this may look kind of complicated, but if you stick with me I think you'll see how easy this can be once you understand what's going on.

I have my cursor in the blank area right underneath the navigation area here. What I'm going to do is insert an image. I'm going to choose Insert Image. If I look in assets > images > hints, there's a file in here called blank.gif I don't see a preview for it because it's actually a blank image. It's just a plain white image. Notice that it has dimensions anyway, it's set to 600 x 20 pixels in size. Now, why would we care about the dimensions of an image that we can't see? Well, notice that these other images are all also 600 x 20 pixels, because we're going to be swapping this blank image for all of other different images, and remember, when we have rollovers, they all have to be the exact same dimensions. But we need to have some sort of placeholder image there first, in order to have something to swap with when we perform our rollovers.

So, I'm going to have "blank" selected, I'll click Choose. So, there's the image. If I click off of it, it looks like nothing's there, But there is in fact, that blank image right there. I want to give this an ID so, down here in the Property inspector, with the image selected, I'm going to call this "hintimage". Because each image that has rollover attached to it has to have a valid ID in order for {italic}Dreamweaver's{plain} JavaScript to find it. Now, let's take a look at how we create our actual rollover. I'm going to close this CSS panel just so I have more room here to open up the Tag Inspector panel, and I'm going to make sure I'm in my Behaviors panel. Now, I'm going to come in here, and select aboutus.

Notice that aboutus already has some of the behaviors attached to it. It's in the Behaviors panel where we find all the JavaScript that we've attached for our images. These JavaScripts are called behaviors in {italic}Dreamweaver,{plain} and here are the JavaScript that{italic} Dreamweaver{plain} wrote in the previous movie when we created our simple rollover. Notice that we have a "Swap Image" behavior here, and it's associated with this "onMouseOver". Basically it's saying when the user rolls his, or her mouse over the image, swap that image out for whatever image was specified. {italic}Dreamweaver{plain} also wrote this "onMouseOut" behavior, saying Swap Image Restore so, when the user rolls the mouse out of the image area, it will restore the image back to its original state.

But now I want to add to these existing rollovers to create my disjointed rollover. To do this, I'm going to come in here, and double-click where it says swap image that opens up the swap image dialog box, and in here I can see the details for the rollover that's already applied to this image. Notice the image named "aboutus" has little * next to it indicating that this is the image that changes during the rollover. Notice the "Set source to" field shows us the aboutus-over image is the one that it changes to. In this images area up here, every single image on our page is listed, which is why it's important to name our images, or to give our images IDs, like I did. Otherwise, the unnamed images, and you can see we have a few here, just swap like this, and you would have no idea what image were working with.

So, inside this Swapping Dialog box, I'm going to choose which other image is going to be changed when we rollover "about us". In this case it's going to be that blank "hintimage" that we selected. What's that image going to be swapped for? That's where the Set source field comes into play. I'm going to click Browse, and in the hints folder, we have "aboutus.gif", and you can't really see it here, but this is a little text hint that will go along with the rolling over of the aboutus image. I'm going to click Choose, and notice now a little * has appeared next to "hintimage" indicating that it will also change during swap image behavior. We also have these two check boxes down here. We have "Preload images", which as I explained in the previous movie, ensures that all of your rollover images are loaded into the browser as soon as the page loads. That way when the user rolls over the image, the image will swap right away instead of the image having to download first and then appear.

We also have "Restore images onMouseOut", which again, insures that when the user rolls his, or her mouse out of the image area, it will be restored back to the original version. Let's click on OK, and we can save this, and we can test this now. I'll rollover About Us, and there's the image. It says, "Find out more about the Teacloud philosophy". Looks like some text has appeared, but we know this is actually an image. It looks like that image is just appearing out of nowhere, but we know now that there's actually a blank image right here, and it's being swapped out for this About Us text when we rollover here. So, we actually have two rollovers occurring. One on the About Us button itself, and the other is swapping out this About Us text for the hint image. Let's do this again, just so we can get the hang of this.

I'm going to click Our Products, and I'll come in here, and double-click Swap Image. Notice that ourproducts has the * next to it, and again, I'm going to choose hintimage as the image that needs to be swap out when I rollover Our Products. I'll Browse, and we'll find ourproducts, another text description, click Choose, and OK. Save our page, preview it in our browser, and there it is. Pretty cool stuff. So, we have the same blank image down here being swapped out depending on which of these navigation buttons we're rolling over. Let's finish this off.

We'll go back, select About Tea, double-click Swap Image, choose hintimage > Browse, find the abouttea description, click Choose, and OK. Brewing tea, we'll double-click there, and again, we'll select our hintimage > Browse select our brewingtea.gif, click on OK, and there we have it. Save this page, preview, and there it is. Now, we have four very quickly made disjointed rollovers. I hope that made sense to you. If not, go back, and watch it again, or better yet play with this yourself, and it will slowly start to make sense.

Basically, all we're doing is using these navigation buttons as a trigger. We're using them to trigger a rollover. Whether that rollover occurs on the actual image itself, or elsewhere is totally up to us. We just have to come in here, and choose a swap image. On this particular exercise, we worked with images that already had rollovers. But you can add this to any other rollover. Just select the image, and I actually suggest that you select the "a" Tag, so that the behavior is added to the actual anchor Tag, and not to the image itself, because some older browsers don't honor JavaScript that are attached to images. They'll only honor them if they're attached to links. So, with "a" selected, I can come in here, and click the + button, and I can actually choose to Swap Image from their. Just for an example here, maybe I want a hintimage to change here, and I'll just pick one of them here. I'll just choose abouttea. Click Choose, and OK. If I preview this in my browser, there's my rollover. So, that's how you would create a disjointed rollover from scratch. I don't really need that on this, so I'm just going to select that again, and we can just delete these JavaScript behaviors by selecting them, and hitting that minus key a couple times to remove those events.

So, that's how you create a disjointed rollover in {italic} Dreamweaver.{plain} I'm going to go ahead, and close this document, and we'll take a look at yet a different type of rollover in the next movie.

Show transcript

This video is part of

Image for Dreamweaver CS3 Essential Training
Dreamweaver CS3 Essential Training

129 video lessons · 86983 viewers

Garrick Chow
Author

 
Expand all | Collapse all
  1. 1m 12s
    1. Welcome
      1m 12s
  2. 21m 0s
    1. HTML vs. XHTML
      3m 4s
    2. What is CSS?
      3m 48s
    3. What is XML?
      2m 11s
    4. What is DHTML?
      1m 9s
    5. What is JavaScript?
      1m 23s
    6. File naming conventions
      3m 22s
    7. What is an index page?
      6m 3s
  3. 46m 18s
    1. Setting up your workspace
      2m 39s
    2. The Welcome screen
      4m 11s
    3. Windows and Mac differences
      3m 18s
    4. The Insert bar
      4m 38s
    5. The Property Inspector
      1m 50s
    6. The Document toolbar
      6m 6s
    7. The Document window
      9m 11s
    8. Panels and panel groups
      6m 58s
    9. Saving workspace layouts
      2m 22s
    10. Defining a default browser
      5m 5s
  4. 24m 59s
    1. Defining a site
      9m 5s
    2. File and folder management
      3m 11s
    3. Understanding path structure
      3m 17s
    4. Adding content to a site
      6m 6s
    5. Creating a site map
      3m 20s
  5. 38m 39s
    1. Creating a new blank site
      6m 0s
    2. Creating and saving a new document
      7m 54s
    3. About DOCTYPE
      3m 59s
    4. Inserting images
      9m 26s
    5. Inserting text
      3m 35s
    6. Aligning text and images
      4m 9s
    7. Inserting meta tags
      3m 36s
  6. 45m 58s
    1. Link basics
      6m 4s
    2. Linking with Point to File
      5m 18s
    3. External links
      4m 15s
    4. Creating email links
      5m 49s
    5. Named anchors
      7m 37s
    6. Linking to a file
      7m 35s
    7. Image maps
      9m 20s
  7. 1h 8m
    1. About CSS
      4m 52s
    2. Anatomy of a style sheet
      4m 10s
    3. CSS and page properties
      10m 11s
    4. Moving an internal style sheet to an external style sheet
      6m 46s
    5. The CSS Styles panel
      3m 48s
    6. CSS selectors
      2m 37s
    7. Type selectors
      12m 13s
    8. ID selectors
      10m 21s
    9. Class selectors
      5m 42s
    10. Creating rollovers with pseudo-class selectors
      7m 22s
  8. 42m 54s
    1. CSS vs. the Font tag
      2m 42s
    2. Formatting text with the Property Inspector
      8m 41s
    3. What measurement should I use?
      3m 15s
    4. Managing white space with margins, padding, and line height
      8m 34s
    5. Using font lists
      5m 45s
    6. Aligning text
      2m 47s
    7. Creating lists
      5m 8s
    8. Creating Flash text
      6m 2s
  9. 43m 19s
    1. About tables
      1m 28s
    2. Tables in Code view
      2m 36s
    3. Creating and adding content to tables
      7m 40s
    4. Changing table borders with XHTML
      5m 46s
    5. Coloring tables with XHTML and CSS
      6m 41s
    6. Aligning table content
      6m 39s
    7. Sorting tables
      3m 6s
    8. Setting table widths
      4m 48s
    9. Creating rounded-corner tables
      4m 35s
  10. 28m 22s
    1. Dreamweaver's layout tools
      3m 8s
    2. Tracing images
      4m 58s
    3. Adding AP div tags
      7m 29s
    4. Working with Layout Tables
      6m 55s
    5. Adjusting table widths and nesting tables
      5m 52s
  11. 16m 19s
    1. What is a device?
      3m 14s
    2. Attaching a printer-friendly style sheet
      3m 5s
    3. Styling for print
      7m 41s
    4. Adobe Device Central
      2m 19s
  12. 29m 54s
    1. Rollover rules
      3m 31s
    2. Creating simple rollovers
      5m 36s
    3. Creating disjointed rollovers
      7m 12s
    4. Creating navigation bars with multiple states
      9m 21s
    5. Creating Flash buttons
      4m 14s
  13. 26m 32s
    1. Viewing the code
      6m 9s
    2. Editing in Code view
      3m 0s
    3. The Code toolbar
      5m 11s
    4. Working with Code Collapse
      4m 27s
    5. The Quick Tag Editor
      2m 20s
    6. Working with snippets
      5m 25s
  14. 32m 45s
    1. About forms
      3m 23s
    2. Adding text fields
      9m 52s
    3. Adding checkboxes and radio buttons
      5m 37s
    4. Adding lists and menus
      6m 5s
    5. Submitting form results
      3m 23s
    6. Styling form elements with CSS
      4m 25s
  15. 23m 17s
    1. Opening a new browser window
      9m 38s
    2. Creating a popup message
      2m 50s
    3. Validating text fields
      2m 42s
    4. Getting more behaviors
      7m 2s
    5. Removing extensions
      1m 5s
  16. 14m 58s
    1. External image editor preferences
      3m 18s
    2. Built-in image editing tools
      3m 11s
    3. Roundtrip editing from Dreamweaver to Fireworks or Photoshop
      4m 39s
    4. Copying and pasting
      3m 50s
  17. 34m 16s
    1. Templates in action
      5m 12s
    2. Creating a new template
      6m 36s
    3. Applying templates
      3m 36s
    4. Modifying a template
      1m 40s
    5. Adding repeating regions
      3m 28s
    6. Working with repeating regions
      3m 13s
    7. Adding optional regions
      3m 34s
    8. Creating a library item
      3m 48s
    9. Modifying a library item
      3m 9s
  18. 13m 2s
    1. Using the History panel
      4m 24s
    2. Saving History steps as commands
      3m 25s
    3. Using Find and Replace
      5m 13s
  19. 14m 44s
    1. W3C accessibility guidelines
      4m 6s
    2. Accessibility preferences
      1m 29s
    3. Inserting accessible images
      3m 2s
    4. Inserting accessible tables
      2m 53s
    5. Inserting accessible form objects
      3m 14s
  20. 26m 17s
    1. About media objects
      2m 6s
    2. Linking to audio and video files
      5m 56s
    3. Embedding audio and video files
      7m 7s
    4. Setting parameters
      4m 27s
    5. Inserting Flash content
      2m 37s
    6. Inserting Flash video
      4m 4s
  21. 28m 47s
    1. Getting site reports
      3m 35s
    2. Checking links sitewide
      3m 30s
    3. Signing up with Tripod
      6m 36s
    4. Entering remote info
      4m 13s
    5. Publishing your site
      5m 41s
    6. Updating and publishing pages
      5m 12s
  22. 44s
    1. Goodbye
      44s

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