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CD-517Appendix F . Examples from Parts III and IV caption NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5 Compatibility Example The following example, for use with The Evaluator (Chapter 13) in NN6+, demonstrates the sequence of assigning a new CAPTION element object to a table. While the table in The Evaluator already has a CAPTION element, the following statements replace it with an entirely new one. Enter each of the following statements into the top text box, starting with the one that saves a long reference into a variable for multiple use at the end: t = document.getElementById( myTable ) a = document.createElement( CAPTION ) b = document.createTextNode( A Brand New Caption ) a.appendChild(b) t.replaceChild(a, t.caption) A view of the table shows that the new caption has replaced the old one because a table can have only one CAPTION element. cellPadding cellSpacing NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5 Compatibility Example Use The Evaluator (Chapter 13) to adjust the cellPaddingand cellSpacing properties of the demonstrator table. First, adjust the padding (IE5+/NN6 syntax): document.getElementById( myTable ).cellPadding = 50 Now, adjust the cell spacing: document.getElementById( myTable ).cellSpacing = 15 Notice how cellSpacing affected the thickness of inter-cell borders. TABLE.cellPadding
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CD-516 Part VI . Appendixes border NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5 Compatibility Example To remove all traces of an outside border of a table (and, in some combinations of attributes of other table elements, borders between cells), use the following statement (in IE5+/NN6+ syntax): document.getElementById( myTable ).border = 0 borderColor borderColorDark borderColorLight NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5 Compatibility Example Assuming that you have set the initial light and dark color attributes of a table, the following function swaps the light and dark colors to shift the light source to the opposite corner: function swapColors(tableRef) { var oldLight = tableRef.borderColorLight tableRef.borderColorLight = tableRef.borderColorDark tableRef.borderColorDark = oldLight } While you can easily invoke this function over and over by ending it with a setTimeout()method that calls this function after a fraction of a second, the results are very distracting to the person trying to read your page. Please don t do it. TABLE.borderColor
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CD-515Appendix F . Examples from Parts III and IV the body by entering the following statement into the top text box for IE5+ and NN6+: document.getElementById( myTable ).align = right background NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5 Compatibility Example Treat the backgroundproperty of a table like you do the srcproperty of an IMG element object. If you precache an image, you can assign the src property of the precached image object to the background property of the table for quick image changing. Such an assignment statement looks like the following: document.all.myTable.background = imgArray[ myTableAlternate ].src bgColor NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5 Compatibility Example Use The Evaluator (Chapter 13) to assign a color to the table. After looking at the table to see its initial state, enter the following IE5+/NN6+ statement into the top text box: document.getElementById( myTable ).bgColor = lightgreen When you look at the table again, you see that only some of the cells turned to green. This is because colors also are assigned to table elements nested inside the outermost table element, and the color specification closest to the actual element wins the context. TABLE.bgColor
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CD-514 Part VI . Appendixes Listing 26-9 (continued) Light Blue Medium Blue Bright Blue Dark Blue

Regular Label Names Label Names from Nature

Chapter 27 Examples The following sections contain examples from Chapter 27, Table and List Objects. TABLE Element Object Properties align NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5 Compatibility Example Use The Evaluator (Chapter 13) to see the alignproperty at work. The default value (left) is in force when the page loads. But you can shift the table to right-align with TABLE.align
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CD-513Appendix F . Examples from Parts III and IV IE5/Mac does not alter the last OPTGROUP element s label, and NN6 achieves only a partial change to the text displayed in the SELECT element. Listing 26-9: Modifying OPTGROUP Element Labels

Choose a background color: Light Red Medium Red Bright Red Dark Red Light Green Medium Green Bright Green Dark Green Continued OPTGROUP.label
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Free web hosts - CD-512 Part VI . Appendixes OPTION Element Object

Wednesday, February 27th, 2008

CD-512 Part VI . Appendixes OPTION Element Object Properties label NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5 Compatibility Example The following statement modifies the text that appears as the selected text in a popup list: document.forms[0].mySelect.options[3].label = Widget 9000 If this option is the currently selected one, the text on the pop-up list at rest changes to the new label. OPTGROUP Element Object Properties label NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5 Compatibility Example I present Listing 26-9 in the hope that Microsoft and Netscape will eventually eradicate the bugs that afflict their current implementations of the labelproperty. When the feature works as intended, Listing 26-9 demonstrates how a script can alter the text of option group labels. This page is an enhanced version of the background color setters used in other examples of this chapter. Be aware that OPTGROUP.label
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Wednesday, February 27th, 2008

CD-511Appendix F . Examples from Parts III and IV Notice two other important changes. First, the SELECT element now contains a blank first option. When a user visits the page, nothing is selected yet, so you should present a blank option to encourage the user to make a selection. The function also makes sure that the user selects one of the color-valued items before it attempts to change the background color. Second, the BODY element contains an onUnload event handler that resets the form. The purpose behind this is that if the user navigates to another page and uses the Back button to return to the page, the script-adjusted background color does not persist. I recommend you return the SELECT element to its original setting. Unfortunately, the reset does not stick to the form in IE4 and IE5 for Windows (although this problem appears to be repaired in IE5.5). Another way to approach this issue is to use the onLoadevent handler to invoke seeColor(), passing as a parameter a reference to the SELECT element. Thus, if the SELECT element choice persists, the background color is adjusted accordingly after the page loads. Listing 26-8: Triggering a Color Change from a Pop-Up Menu

Choose a background color:

Cornflower Blue Dark Salmon Light Goldenrod Yellow Sea Green

SELECT.onChange
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CD-510 Part VI . Appendixes Example The function in Listing 26-6 that accesses the chosen value the long way can be simplified for newer browsers only with the following construction: function seeColor(form) { document.bgColor = form.colorsList.value } Methods item(index) namedItem( optionID ) NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5 Compatibility Example The following statement assigns an OPTION element reference to a variable: var oneOption = document.forms[0].mySelect.namedItem( option3_2 ) Event handlers onChange NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5 Compatibility Example Listing 26-8 is a version of Listing 26-6 that invokes all action as the result of a user making a selection from the pop-up menu. The onChange event handler in the tag replaces the action button. For this application when you desire a direct response to user input an appropriate method is to have the action triggered from the pop-up menu rather than by a separate action button. SELECT.onChange
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CD-509Appendix F . Examples (Hosting your own web site) from Parts III and

Tuesday, February 26th, 2008

CD-509Appendix F . Examples from Parts III and IV Listing 26-7: Using the selectedIndex Property

Red Green Blue

size NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5 Compatibility Example The following statement sets the number of visible items to 5: document.forms[0].mySelect.size = 5 value NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5 Compatibility SELECT.value
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CD-508 Part VI . Appendixes Listing 26-6: Using the options[index].value Property

Choose a background color: Cornflower Blue Dark Salmon Light Goldenrod Yellow Sea Green

selectedIndex NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5 Compatibility Example In the inspect()function of Listing 26-7, notice that the value inside the options property index brackets is a reference to the object s selectedIndexproperty. Because this property always returns an integer value, it fulfills the needs of the index value for the options property. Therefore, if you select Green in the pop-up menu, form.colorsList.selectedIndex returns a value of 1; that reduces the rest of the reference to form.colorsList.options[1].text, which equals Green. SELECT.selectedIndex
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