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Client-side form validation

From: Dreamweaver CS3 Beyond the Basics

Video: Client-side form validation

In many cases, you will want the user to fill out specific information before submitting a form. To assist the user in his process, you can use what is known as form validation. Enabling form validation will disable form submittal until specific elements or requirements have been filled out properly. Good validation also gives clear user feedback; we have supplied some feedback prior to form submittal by giving the required notice to the email address. Now we will add actual form validation to make sure users are adding an email address to their request. There are two types of form validation, client side and server side.

Client-side form validation

In many cases, you will want the user to fill out specific information before submitting a form. To assist the user in his process, you can use what is known as form validation. Enabling form validation will disable form submittal until specific elements or requirements have been filled out properly. Good validation also gives clear user feedback; we have supplied some feedback prior to form submittal by giving the required notice to the email address. Now we will add actual form validation to make sure users are adding an email address to their request. There are two types of form validation, client side and server side.

Dreamweaver can assist you with both. Server side validation requires these to have server software such as ASP, PHP or ColdFusion. While server side validation is more powerful and allows you to be more flexible and how a user feedback is supplied, you might not always have access to server capabilities. So client side validation requires only the use of JavaScript within your form page. Forms are usually validated at the submittal process. So we are still working in our contact. htm example file and let's scroll down to the bottom of it and we need to find our Submit button, and there it is right there, it says Send Request. I am going to select that. So your first task when doing client side form validation is to go ahead and select the submittal button because that is when you want form validation to occur. So now we will go up and we will find our Behaviors panel.

Now I am going to roll the CSS panel up, so I create a little bit more room for myself. The Behaviors panel is found in the Tag inspector grouping. You could also find that by going up to Window and choosing Behaviors to bring that up. If you have used Behaviors panel prior to this, you know how easy this is. You select the element that you want to apply the behavior to, in this case our submittal button, and then we go right up to the Behaviors panel and just click the Plus symbol. Now this is going to populate with a list of all available behaviors. These behaviors are simply JavaScript additions to your files. If you are proficient in JavaScript, you can create one of your own. We will actually do that in a later exercise in this title.

I am going to scroll down and I see right in this list, we have Validate Form. I am going to choose that and this nice little dialog box that comes up and all the elements on the page that can respond to Form Validation are listed and we have three; we can make the name required, the email required or the text area required. Well, we have only told the users that the email is required, so I am going to select that and for Value I will choose Required. You can see there is a little R beside it. But we just don't want to make it required; we want to let them know that they need to type in an email. We also want Dreamweaver to write a script that will check to see if any email address has been used.

So instead of accepting anything, I am going to click on the Email address radio button and you can now see it says required is email. So we will go ahead and click OK. When you create a behavior, it will list itself in the Behaviors panel and you can see that it says onClick Validate Form. If we ever wanted to change the behavior, all we have to do is double-click it and the same dialog box we had opened will come right back opened again. We could also change the event. Right now the default is onClick. But if I grab the pulldown menu beside it, I could choose onBlur, onFocus, onKeyDown. I could really pass along any event that I wanted to this behavior. That's all there really is to Dreamweaver's client side form validation.

Let's save our file, preview it in browser, and now as I fill my form out, scroll down so I can fill it out. If I go ahead and enter a name and start clicking around and adding some more comments, and if I click on send request, notice that now I get a little popup message that comes out that says hey, the following error has occurred: - email is required. So a client side validation really only gives us the ability to have this popup come up. But often times that's all the feedback the user really requires.

I can click OK. So I could type in genericName@generic.com and even though I haven't filled out anything else in the rest of the form, I hit send request and I don't get that error message. So there you have client side form validation brought to you by Dreamweaver's behaviors, really quick, very easy way to add a little bit of functionality to your page. Now our final form's exercise is going to be taking a look at the new Spry validation widgets.

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This video is part of

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Dreamweaver CS3 Beyond the Basics

102 video lessons · 38884 viewers

James Williamson
Author

 
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  1. 2m 3s
    1. Welcome
      1m 17s
    2. Using the exercise files
      46s
  2. 1h 23m
    1. Reviewing the Coding toolbar
      8m 42s
    2. Customizing the Coding toolbar
      9m 52s
    3. Taking advantage of Code Hinting
      7m 20s
    4. Using snippets and shortcuts
      11m 10s
    5. Using the Quick Tag Editor
      5m 18s
    6. Using Find and Replace
      9m 50s
    7. Regular expressions
      5m 39s
    8. Using Bridge with Dreamweaver CS3
      8m 28s
    9. Round-trip editing with Photoshop CS3
      3m 40s
    10. Leveraging image variables in Photoshop CS3
      7m 32s
    11. Integrating external variables into your workflow
      6m 16s
  3. 37m 26s
    1. Understanding the CSS Styles panel
      7m 59s
    2. Understanding the Cascade
      5m 50s
    3. Understanding Inheritance
      5m 8s
    4. Understanding Specificity
      7m 5s
    5. Managing CSS styles
      5m 4s
    6. Using Design-Time style sheets
      6m 20s
  4. 2h 19m
    1. Using the new CSS template pages
      5m 59s
    2. Understanding DIV tag structure and layout
      12m 0s
    3. Understanding the CSS box model
      10m 0s
    4. Using absolute and relative positioning
      8m 35s
    5. Understanding floating elements
      7m 9s
    6. Clearing floats
      7m 19s
    7. Using floats to control page layout
      3m 45s
    8. Building structure and assigning IDs
      10m 19s
    9. Applying basic styling to structured content
      11m 14s
    10. Positioning container elements
      11m 4s
    11. Enhancing layouts with background graphics
      11m 48s
    12. Creating faux columns with background graphics
      8m 55s
    13. Creating rounded corners with background graphics
      9m 17s
    14. Building navigation with CSS
      16m 57s
    15. Using Dreamweaver's Browser Check feature
      5m 31s
  5. 53m 22s
    1. Creating properly structured forms
      6m 30s
    2. Creating accessible forms
      6m 41s
    3. Using CSS to lay out form structure
      7m 40s
    4. Creating vertical columns for form elements
      7m 48s
    5. Adding user feedback
      5m 52s
    6. Applying advanced styling to forms
      8m 11s
    7. Client-side form validation
      4m 17s
    8. Validating forms with the Spry Validation tools
      6m 23s
  6. 1h 20m
    1. Understanding the Spry framework
      3m 43s
    2. Defining a data source for use in Spry
      3m 56s
    3. Creating a Spry table
      8m 8s
    4. Using the Spry widgets
      8m 11s
    5. Connecting various data sets
      4m 50s
    6. Understanding Spry widget structures
      7m 1s
    7. Applying custom styles to Spry widgets
      6m 24s
    8. Applying additional custom styles to Spry widgets
      8m 46s
    9. Controlling Spry widget behaviors with JavaScript
      6m 0s
    10. Controlling Spry widget animations with JavaScript
      9m 31s
    11. Creating effects with Spry behaviors
      4m 42s
    12. Hand-coding Spry
      9m 11s
  7. 1h 11m
    1. Creating a base template
      8m 6s
    2. Creating editable attributes
      6m 26s
    3. Creating a new page from a template
      7m 42s
    4. Applying a template to an existing page
      4m 36s
    5. Creating nested templates
      5m 24s
    6. Using repeating regions
      6m 34s
    7. Creating editable and non-editable optional regions
      6m 0s
    8. Using template parameters
      7m 26s
    9. Using template expressions
      9m 59s
    10. Using conditional template expressions
      8m 54s
  8. 54m 40s
    1. Examining XML structure
      2m 44s
    2. Creating an XML document
      9m 9s
    3. Using the CDATA structure
      5m 7s
    4. Creating an XSLT file
      4m 33s
    5. Binding data from an XML to an XSLT document
      5m 6s
    6. Inserting repeating regions into an XSL document
      5m 16s
    7. Creating a client-side XSL transformation
      2m 52s
    8. Styling a remote RSS feed
      7m 29s
    9. Creating a server-side XSL transformation
      5m 31s
    10. Writing XSL expressions
      6m 53s
  9. 1h 2m
    1. Overview of building dynamic websites
      1m 35s
    2. Installing PHP, MySQL, and Apache on Mac
      3m 22s
    3. Installing PHP, MySQL, and Apache on Windows
      3m 54s
    4. Creating a MySQL database
      3m 16s
    5. Defining a testing server and database bindings
      6m 14s
    6. Creating a database recordset
      4m 35s
    7. Adding dynamic content to the page
      5m 14s
    8. Creating repeating regions of dynamic content
      7m 6s
    9. Filtering database records
      7m 39s
    10. Using the Live Preview
      10m 22s
    11. Passing URL parameters
      4m 23s
    12. Dynamically generating links
      5m 18s
  10. 57m 9s
    1. Understanding behaviors
      5m 16s
    2. Installing additional behaviors
      3m 39s
    3. Planning to create a custom behavior
      3m 42s
    4. Examining existing behaviors
      5m 32s
    5. Building a behavior function
      7m 23s
    6. Creating an Action file
      6m 48s
    7. Enabling behavior functions
      9m 1s
    8. Initializing the user interface for a behavior
      3m 9s
    9. Loading behaviors in Dreamweaver
      6m 47s
    10. Testing and debugging behaviors
      5m 52s
  11. 27m 12s
    1. Running reports
      7m 41s
    2. Checking and validating links
      3m 40s
    3. Using cloaking
      5m 42s
    4. Using Check In/Check Out
      4m 3s
    5. Using Design Notes
      6m 6s
  12. 20s
    1. Goodbye
      20s

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