CD-458 Part VI . Appendixes Listing 22-3 (continued)

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If you don t explicitly set the start property to fileopen (as shown in Listing 22-3), users of IE for the Macintosh have to double-click (IE4) or click (IE5) the movie image to make it run. fileCreatedDate fileModifiedDate fileSize NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5 Compatibility Example These properties are similar to the same-named properties of the document object. You can see these properties in action in Listing 18-4. Make a copy of that listing, and supply an image before modifying the references from the document object to the image object to see how these properties work with the IMG element object. height width NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5 Compatibility IMG.height
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CD-457Appendix F . Examples from Parts III and IV Example To swap between still and video sources, simply empty the opposite property. Listing 22-3 shows a simplified example that swaps between one fixed image and one video image. This listing exhibits most of the bugs associated with changing between static image and video sources described in the text. Listing 22-3: Changing Between Still and Motion Images

IMG dynsrc Property

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Choose image type: Still Video

Play video how many times after loading: Once Twice Continuously Continued IMG.dynsrc
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Web hosting india - CD-456 Part VI . Appendixes Example To experiment

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CD-456 Part VI . Appendixes Example To experiment with the image.completeproperty, quit and relaunch your browser before loading Listing 22-2 (in case the images are in memory cache). As each image loads, click the Is it loaded yet? button to see the status of the completeproperty for the image object. The value is falseuntil the loading finishes; then, the value becomes true. The arch image is the bigger of the two image files. You may have to quit and relaunch your browser between trials to clear the arch image from the cache (or empty the browser s memory cache). If you experience difficulty with this property in your scripts, try adding an onLoadevent handler (even if it is empty, as in Listing 22-2) to your tag. Listing 22-2: Scripting image.complete

dynsrc NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5 Compatibility IMG.dynsrc
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CD-455Appendix F . Examples from Parts III and IV alt NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5 Compatibility Example Use The Evaluator (Chapter 13) to assign a string to the alt property of the document.myIMG image on the page. First, assign a nonexistent image to the src property to remove the existing image: document.myIMG.src = fred.gif Scroll down to the image, and you can see a space for the image. Now, assign a string to the alt property: document.myIMG.src = Fred s face The extra backslash is required to escape the apostrophe inside the string. Scroll down to see the new alttext in the image space. border NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5 Compatibility Example Feel free to experiment with the document.myIMG.border property for the image in The Evaluator (Chapter 13) by assigning different integer values to the property. complete NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5 Compatibility IMG.complete
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CD-454 Part VI . Appendixes Example Listing 22-1 enables you to choose from the different alignproperty values as they influence the layout of an image whose HTML is embedded inline with some other text. Resize the window to see different perspectives on word-wrapping on a page and their effects on the alignment choices. Not all browsers provide distinctive alignments for each choice, so experiment in multiple supported browsers. Listing 22-1: Testing an Image s align Property

IMG align Property

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Choose the image alignment: absbottom absmiddle baseline bottom left middle right texttop top

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IMG.align
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CD-453Appendix F . Examples from Parts III and IV }

TextRectangle Object

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Click on any of the four colored elements in the paragraph below and watch the highlight rectangle adjust itself to the element s TextRectangle object.

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Chapter 22 Examples The following sections contain examples from Chapter 22, Image, Area, and Map Objects. Image and IMG Element Objects Properties align NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5 Compatibility IMG.align
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CD-452 Part VI . Appendixes An important part of the listing is the way the action of sizing and showing the positioned element is broken out as a separate function (setHiliter()) from the one that is the onClickevent handler function (handleClick()). This is done so that the onResize event handler can trigger a script that gets the current rectangle for the last element clicked, and the positioned element can be sized and moved to maintain the highlight of the same text. As an experiment, try removing the onResize event handler from the tag and watch what happens to the highlighted rectangle after you resize the browser window: the rectangle that represents the TextRectangleremains unchanged and loses track of the abstract TextRectangle associated with the actual element object. Listing 19-12: Using the TextRectangle Object Properties