MACROMEDIA FLASH 8-LEARNING ACTIONSCRIPT 2.0 IN FLASH Manual - page 107

About variables

107

The first line of code specifies the image that you want to dynamically load into your 

Flash document. Next, you check whether a new value for 

imgURL

 was specified using 

FlashVars or URL-encoded variables. If a new value was specified, the default image URL 

is overwritten with the new value. For information on using URL variables, see 

“Using 

variables from the URL” on page 101

. For information on FlashVars, see 

“Using FlashVars 

in an application” on page 104

.

The next couple of lines of code define the MovieClip instance, and a Listener object for 

the future MovieClipLoader instance. The MovieClipLoader’s Listener object defines two 

event handlers, 

onLoadInit

 and 

onLoadError

. The handlers are invoked when the image 

successfully loads and initializes on the Stage, or if the image fails to load. Then you create 

a MovieClipLoader instance, and use the 

addListener()

 method to add the previously 

defined listener object to the MovieClipLoader. Finally, the image is downloaded and 

triggered when you call the 

MovieClipLoader.loadClip()

 method, which specifies the 

image file to load and the target movie clip to load the image into.

3.

Select Control > Test Movie to test the document.

Because you’re testing the Flash document in the authoring tool, no value for 

imgUrl

 will 

be passed by FlashVars or along the URL, and therefore the default image displays.

4.

Save the Flash document and select File > Publish to publish the file as a SWF and HTML 

document.

5.

If you test your document in the Flash tool (select Control > Test Movie) or in a local 

browser (File > Publish Preview > HTML), you will see that the image centers itself both 

vertically and horizontally on the Stage.

6.

Edit the generated HTML document in an editor (such as Dreamweaver or Notepad), and 

modify the default HTML to match the following text: