TAILIEUCHUNG - HTML in 10 Steps or Less- P25

HTML in 10 Steps or Less- P25:Welcome to HTML in 10 Simple Steps or Less. Our mission in writing this book is to provide a quick and accessible way for you to learn Hypertext Markup Language — the lingua franca of the World Wide Web. We hope this book provides a resource that beginning and intermediate HTML coders can use to improve their Web development skills. It is also our hope that it fills multiple roles as both a teaching tool and a reference once you expand your skills. | 456 Part 15 Task XA Using the Preload Images Behavior notes This step assures you that the JavaScript code the behavior wrote works with not only current browsers but previous ones as well. Of course selecting really old browsers limits the effects you can use. If you don t click the plus button before attempting to enter another image the image you last chose will be replaced by the next image you choose. The Preload Images behavior loads images into the visitor s browser cache. Once the images are loaded the browser loads the rest of the page and the entire document appears at once. This provides a more uniform experience for the visitor so they don t have to watch the site construct itself in front of their eyes. 1. Attach the Preload Images behavior to the body section of your document by selecting the body tag on the tag selector in the lower-left corner of the document window see Figure 214-1 . Figure 214-1 Selecting the body tag in the document window s tag selector 2. Open the Behaviors panel by selecting Windows Behaviors from the menu bar. 3. Click the Behaviors panel s plus button and choose Show Events For and Later Browsers. 4. Click the Behaviors panel s plus button a second time and choose Actions Preload Images. This opens the Preload Images dialog box see Figure 214-2 . Figure 214-2 The Preload Images dialog box Please purchase PDF Split-Merge on to remove this watermark. Working with Dreamweaver 457 5. Click Browse to locate an image file to preload or else enter an image s pathname in the Image Source File field. 6. Click the plus button at the top of the dialog box to add the image from the Image Source File field to the Preload Images list. This clears the Image Source File field so you can select another image. 7. Repeat Steps 5 and 6 for each image you want to preload for this document. 8. To remove an image from the Preload Images list select the image in the list and click the minus button. 9. When you ve selected all .

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