<html>
<link rel="stylesheet" href="josh.css">
<body bgcolor="#FFFFFF">

		<div id="Description">
			<table cellpadding="0" cellspacing="0" border="0" width="100%" class="main">
				<tr><td valign="top" class="name">fieldset</td><td valign="top" nowrap class="compatibility">NN <span class="emphasis">6</span> IE <span class="emphasis">4</span> DOM <span class="emphasis">1</span>&nbsp;&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" nowrap class="usage"><p class="literal"></p>
					</td><td valign="top" nowrap class="requirements">&nbsp;&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="description">
						<p>The <span class="literal">fieldset</span> object reflects the
<span class="literal">fieldset</span> element. IE 5 for Macintosh implements
the client and scroll measurement properties for this object.
</p>
												</td>
</tr>
				<tr>
					<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="htmlequivalent"><span class="title">HTML Equivalent</span></td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
				</tr>
				<tr>
					<td><span class="programlisting"><pre>&lt;fieldset&gt;</pre>
						</span></td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="objectmodelreference"><span class="title">Object Model Reference</span></td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
				</tr>
				<tr>
					<td><span class="programlisting"><pre>[window.]document.getElementById("<span class="replaceable">elementID</span>")</pre>
						</span></td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="objectspecificproperties"><span class="title">Object-Specific Properties</span></td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
				</tr>
				<tr>
					<td>
						<table border="1"><tbody><tr><td><span class="literal">align</span></td><td><span class="literal">form</span></td><td><span class="literal">margin</span></td>
								</tr>
							</tbody></table>
					</td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="objectspecificmethods"><span class="title">Object-Specific Methods</span></td>
				</tr>
				<tr>
					<td colspan="2"><p>			None.</p>
					</td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="objectspecificeventhandlerproperties"><span class="title">Object-Specific Event Handler Properties</span></td>
				</tr>
				<tr>
					<td colspan="2"><p>			None.</p>
					</td>
				</tr>
			</table>
		</div>
		<div id="accessKey">
					<table cellpadding="0" cellspacing="0" border="0" width="100%" class="main">
						<tr><td valign="top" class="name">accessKey</td><td valign="top" nowrap class="compatibility">NN <span class="emphasis">n/a</span> IE <span class="emphasis">4</span> DOM <span class="emphasis">1</span>&nbsp;&nbsp;</td>
						</tr>
						<tr>
							<td valign="top" nowrap class="usage"><p class="literal"></p>
							</td><td valign="top" nowrap class="requirements"><span class="emphasis">Read/Write</span>&nbsp;&nbsp;</td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="description"><p>			This is single character key that either gives focus to an element
		(in some browsers) or activates a form control or link action. The
		browser and operating system determine if the user must press a
		modifier key (e.g., <span class="emphasis">Ctrl</span>, <span class="emphasis">Alt</span>, or <span class="emphasis">Command</span>) with the access key to activate the
		link. In Windows versions of IE 5 and later and Netscape 6, the
		<span class="emphasis">Alt</span> key is required and the key is
		not case-sensitive. For Macintosh versions of IE 5 and later and
		Netscape 6, the <span class="emphasis">Ctrl</span> modifier key is
		required to effect the action.
		</p>
									</td>
								</tr>
						<tr>
							<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
						</tr>
								<tr>
									<td colspan="2"><p>			Although listed here as a widely shared property, that
		isn't strictly the case across all implementations.
		Netscape 6 (per the W3C DOM) recognizes this property only for the
		following elements: <span class="literal">a</span>, <span class="literal">area</span>,
		<span class="literal">button</span>, <span class="literal">input</span>,
		<span class="literal">label</span>, <span class="literal">legend</span>, and
		<span class="literal">textarea</span>. To this list, IE 4 adds
		<span class="literal">applet</span>, <span class="literal">body</span>,
		<span class="literal">div</span>, <span class="literal">embed</span>,
		<span class="literal">isindex</span>, <span class="literal">marquee</span>,
		<span class="literal">object</span>, <span class="literal">select</span>,
		<span class="literal">span</span>, <span class="literal">table</span>, and
		<span class="literal">td</span> (but removes <span class="literal">label</span> and
		<span class="literal">legend</span>). IE 5 adds every other renderable element,
		but with a caution. Except for <span class="literal">input</span> and other
		form-related elements, you must also assign a
		<span class="literal">tabindex</span> attribute or <span class="literal">tabIndex</span>
		property value to the IE 5 and later element (even if
		it's simply a value of zero for all) to let the
		accelerator key combination bring focus to the element. As of Version
		7, Netscape does not alter UI behavior if a script changes the
		property's value.
		</p>
									</td>
	</tr>

						<tr>
							<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="example"><span class="title">Example</span></td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
						</tr>
						<tr>
							<td><span class="programlisting"><pre>document.links[3].accessKey = "n";</pre>
								</span></td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="value"><span class="title">Value</span></td>
						</tr>
						<tr>
							<td colspan="2"><p>			Single alphanumeric (and punctuation) keyboard character.</p>
							</td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
						</tr>
						<tr>
							<td valign="top" nowrap colspan="2" class="default"><span class="title">Default</span></td>
						</tr>
						<tr>
							<td colspan="2"><p>			Empty string. </p>
							</td>
						</tr>
					</table>
		</div>
		<div id="align">
			<table cellpadding="0" cellspacing="0" border="0" width="100%" class="main">
				<tr><td valign="top" class="name">align</td><td valign="top" nowrap class="compatibility">NN <span class="emphasis">n/a</span> IE <span class="emphasis">4</span> DOM <span class="emphasis">n/a</span>&nbsp;&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" nowrap class="usage"><p class="literal"></p>
					</td><td valign="top" nowrap class="requirements">Read/Write&nbsp;&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="description">
						<p>Defines the horizontal alignment of the element within its
surrounding container. In practice, this property has little effect
on the <span class="literal">fieldset</span> object or its contents in IE 4. It
behaves erratically in IE 6 for Windows, but responds as expected in
IE 5 for Macintosh.
</p>
												</td>
</tr>
				<tr>
					<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="example"><span class="title">Example</span></td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
				</tr>
				<tr>
					<td><span class="programlisting"><pre>document.getElementById("myFieldset").align = "center";</pre>
						</span></td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="value"><span class="title">Value</span></td>
				</tr>
				<tr>
					<td colspan="2"><p>			Any of the three horizontal alignment constants:
<span class="literal">center</span> | <span class="literal">left</span> |
<span class="literal">right</span>.
</p>
					</td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" nowrap colspan="2" class="default"><span class="title">Default</span></td>
				</tr>
				<tr>
					<td colspan="2"><p>			<span class="literal">left</span></p>
					</td>
				</tr>
			</table>
		</div>
		<div id="blur( )">
					<table cellpadding="0" cellspacing="0"

		border="0" width="100%" class="main">
						<tr><td valign="top" class="name">blur(

		)</td><td valign="top" nowrap class="compatibility">NN <span

		class="emphasis">2</span> IE <span class="emphasis">3</span> DOM <span

		class="emphasis">1</span>&nbsp;&nbsp;</td>
						</tr>
						<tr>
							<td valign="top" nowrap

		class="usage"><p class="literal"></p>
							</td><td valign="top" nowrap

		class="requirements"></td>
						</tr>
						<tr>
							<td valign="top" colspan="2"

		class="description"><p>			Removes

		focus from the current object, at which time the
		object's <span class="literal">onblur</span> event fires. Note
		that the range of elements capable of focus and blur (both the event
		and method) is limited in all browsers except for more recent
		versions of IE (see the shared <span class="literal">tabindex</span>

		attribute
		in Chapter 8). Most reliably for backward
		compatibility, apply the <span class="literal">blur( )</span> method to
		blatantly focusable elements, such as text <span

		class="literal">input</span>
		and <span class="literal">textarea</span> elements. Assigning the

		attribute
		<span class="literal">onfocus="this.blur( );"</span> to a text
		<span class="literal">input</span> element, for instance, is a crude

		but
		effective backward-compatible way to largely disable a field for
		browsers that do not provide genuine element disabling.
		</p>
									</td>
								</tr>
						<tr>
							<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
						</tr>
								<tr>
									<td colspan="2"><p>			Use

		<span class="literal">blur( )</span> and <span class="literal">focus(

		)</span>
		methods in moderation on the same page. You can inadvertently trigger
		endless loops of blurring and focusing if alert dialog boxes are
		involved along the way. Moreover, be aware that when you invoke the
		<span class="literal">blur( )</span> method on one object, some other

		object
		(perhaps the <span class="literal">window</span> object) receives an
		<span class="literal">onfocus</span> event.
		</p>
									</td>
	</tr>

						<tr>
							<td valign="top" colspan="2"

		class="CLEARSEPARATION">&nbsp;</td>
						</tr>
						<tr>
							<td valign="top" colspan="2"

		class="parameters"><span class="title">Parameters</span></td>
						</tr>
						<tr>
							<td colspan="2"><p>			None.</p>
							</td>
						</tr>
						<tr>
							<td valign="top" colspan="2"

		class="CLEARSEPARATION">&nbsp;</td>
						</tr>
						<tr>
							<td valign="top" colspan="2"

		class="returnedvalue"><span class="title">Returned Value</span></td>
						</tr>
						<tr>
							<td colspan="2"><p>			None.</p>
							</td>
						</tr>
					</table>
		</div>

		<div id="clientHeight, clientWidth">
					<table cellpadding="0" cellspacing="0" border="0" width="100%" class="main">
						<tr><td valign="top" class="name">clientHeight, clientWidth</td><td valign="top" nowrap class="compatibility">NN <span class="emphasis">7</span> IE <span class="emphasis">4</span> DOM <span class="emphasis">n/a</span>&nbsp;&nbsp;</td>
						</tr>
						<tr>
							<td valign="top" nowrap class="usage"><p class="literal"></p>
							</td><td valign="top" nowrap class="requirements"><span class="emphasis">Read-only</span>&nbsp;&nbsp;</td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="description"><p>			Broadly speaking, these provide the height and width of the
		element's content, but with minor variations with
		respect to element padding among various operating system versions of
		IE and compatibility modes controlled by the
		<span class="literal">DOCTYPE</span> declaration. Not available for all element
		types in IE for Macintosh. For Netscape 7, values are zero except
		when an element's content overflows the viewable
		area, in which case the values reveal the dimensions of the viewable
		area (e.g., the browser window's content region for
		the <span class="literal">document.body</span> element). See the Section 9.2 at the beginning of
		this chapter for details.
		</p>
									</td>
	</tr>

						<tr>
							<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="example"><span class="title">Example</span></td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
						</tr>
						<tr>
							<td><span class="programlisting"><pre>var midHeight = document.body.clientHeight/2;</pre>
								</span></td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="value"><span class="title">Value</span></td>
						</tr>
						<tr>
							<td colspan="2"><p>			Integer pixel value.</p>
							</td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
						</tr>
						<tr>
							<td valign="top" nowrap colspan="2" class="default"><span class="title">Default</span></td>
						</tr>
						<tr>
							<td colspan="2"><p>			<span class="literal">0</span> </p>
							</td>
						</tr>
					</table>
				</div>
<div id="clientLeft, clientTop">
			<table cellpadding="0" cellspacing="0" border="0" width="100%" class="main">
				<tr><td valign="top" class="name">clientLeft, clientTop</td><td valign="top" nowrap class="compatibility">NN <span class="emphasis">n/a</span> IE <span class="emphasis">4</span> DOM <span class="emphasis">n/a</span>&nbsp;&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" nowrap class="usage"><p class="literal"></p>
					</td><td valign="top" nowrap class="requirements"><span class="emphasis">Read-only</span>&nbsp;&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="description">
						<p>Broadly speaking, these provide the left and top coordinates of the
element's content within the box that includes the
element's padding, but with minor variations among
various operating system versions of IE. Not available for all
element types in IE for Macintosh. See the Section 9.2 at the beginning of
this chapter for details. More useful information for inline element
positioning generally comes from the <span class="literal">offsetLeft</span>
and <span class="literal">offsetTop</span> properties (including Netscape 6).
For CSS-positioned elements (including changing an
element's position), use <span class="literal">style</span>
object properties, such as <span class="literal">left</span> and
<span class="literal">top</span>, and (in IE only) <span class="literal">pixelLeft</span>
and <span class="literal">pixelTop</span>.
</p>
												</td>
</tr>
				<tr>
					<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="value"><span class="title">Value</span></td>
				</tr>
				<tr>
					<td colspan="2"><p>			Integer pixel value.</p>
					</td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" nowrap colspan="2" class="default"><span class="title">Default</span></td>
				</tr>
				<tr>
					<td colspan="2"><p>			<span class="literal">0</span> </p>
					</td>
				</tr>
			</table>
		</div>
		<div id="filters[ ]">
					<table cellpadding="0" cellspacing="0" border="0" width="100%" class="main">
						<tr><td valign="top" class="name">filters[ ]</td><td valign="top" nowrap class="compatibility">NN <span class="emphasis">n/a</span> IE <span class="emphasis">4</span> DOM <span class="emphasis">n/a</span>&nbsp;&nbsp;</td>
						</tr>
						<tr>
							<td valign="top" nowrap class="usage"><p class="literal"></p>
							</td><td valign="top" nowrap class="requirements">&nbsp;&nbsp;</td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="description"><p>			Returns an array of all <span class="literal">filter</span> objects contained
		by the current element. Applies only to the following element
		objects: <span class="literal">bdo</span>, <span class="literal">body</span>,
		<span class="literal">button</span>, <span class="literal">div</span>,
		<span class="literal">fieldset</span>, <span class="literal">img</span>,
		<span class="literal">input</span>, <span class="literal">marquee</span>,
		<span class="literal">rt</span>, <span class="literal">ruby</span>,
		<span class="literal">span</span>, <span class="literal">table</span>,
		<span class="literal">td</span>, <span class="literal">textarea</span>, and
		<span class="literal">th</span>. See the <span class="literal">filter</span> object for
		referencing syntax.
		</p>
									</td>
	</tr>

						<tr>
							<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="value"><span class="title">Value</span></td>
						</tr>
						<tr>
							<td colspan="2"><p>			Array of <span class="literal">filter</span> object references.</p>
							</td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
						</tr>
						<tr>
							<td valign="top" nowrap colspan="2" class="default"><span class="title">Default</span></td>
						</tr>
						<tr>
							<td colspan="2"><p>			Array of length zero.</p>
							</td>
						</tr>
					</table>
				</div>

<div id="focus( )">
			<table cellpadding="0" cellspacing="0"

border="0" width="100%" class="main">
				<tr><td valign="top"

class="name">focus( )</td><td valign="top" nowrap class="compatibility">NN <span class="emphasis">2</span> IE <span

class="emphasis">3</span> DOM <span class="emphasis">1</span>&nbsp;&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" nowrap

class="usage"><p class="literal"></p>
					</td><td valign="top" nowrap

class="requirements"></td>
				</tr>
				<tr>
					<td valign="top" colspan="2"

class="description">
						<p>			Gives

focus from the current object, at which time the
object's <span class="literal">onfocus</span> event fires.
Note that the range of elements capable of focus and blur (both the
event and method) is limited in all browsers except for more recent
versions of IE (see the shared <span class="literal">tabindex</span>

attribute
in Chapter 8). Most reliably for backward
compatibility, apply the <span class="literal">focus( )</span> method

to
blatantly focusable elements, such as text <span

class="literal">input</span>
and <span class="literal">textarea</span> elements.
</p>
							</td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
						</tr>
						<tr>
							<td colspan="2"><p>			To give

a text box focus and pre-select all the text in the box, use
the sequence of <span class="literal">focus( )</span> and <span

class="literal">select(
)</span> methods on the element. If this sequence is to occur
after windows change (such as after an alert dialog box closes),
place the methods in a separate function, and invoke this function
through the <span class="literal">setTimeout( )</span> method following

the
<span class="literal">alert( )</span> method for the dialog. This

allows
IE/Windows to sequence statement execution correctly.
</p>
												</td>
</tr>
				<tr>
					<td valign="top" colspan="2"

class="CLEARSEPARATION">&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" colspan="2"

class="parameters"><span class="title">Parameters</span></td>
				</tr>
				<tr>
					<td colspan="2"><p>			None. </p>
					</td>
				</tr>
				<tr>
					<td valign="top" colspan="2"

class="CLEARSEPARATION">&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" colspan="2"

class="returnedvalue"><span class="title">Returned Value</span></td>
				</tr>
				<tr>
					<td colspan="2"><p>			None.</p>
					</td>
				</tr>
			</table>
		</div>

		<div id="form">
			<table cellpadding="0" cellspacing="0" border="0" width="100%" class="main">
				<tr><td valign="top" class="name">form</td><td valign="top" nowrap class="compatibility">NN <span class="emphasis">6</span> IE 5(Mac)/<span class="emphasis">6(Win)</span> DOM <span class="emphasis">1</span>&nbsp;&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" nowrap class="usage"><p class="literal"></p>
					</td><td valign="top" nowrap class="requirements">Read-only&nbsp;&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="description">
						<p>Returns a reference to the next outermost <span class="literal">form</span>
element object in the document tree. Multiple
<span class="literal">fieldset</span> element objects within the same
<span class="literal">form</span> element reference the same
<span class="literal">form</span> element object.
</p>
												</td>
</tr>
				<tr>
					<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="example"><span class="title">Example</span></td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
				</tr>
				<tr>
					<td><span class="programlisting"><pre>var theForm = document.getElementById("myFieldset").form;</pre>
						</span></td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="value"><span class="title">Value</span></td>
				</tr>
				<tr>
					<td colspan="2"><p>			Reference to a <span class="literal">form</span> element object.</p>
					</td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" nowrap colspan="2" class="default"><span class="title">Default</span></td>
				</tr>
				<tr>
					<td colspan="2"><p>			None.</p>
					</td>
				</tr>
			</table>
		</div><div id="margin">
			<table cellpadding="0" cellspacing="0" border="0" width="100%" class="main">
				<tr><td valign="top" class="name">margin</td><td valign="top" nowrap class="compatibility">NN <span class="emphasis">n/a</span> IE <span class="emphasis">5(Mac)</span> DOM <span class="emphasis">n/a</span>&nbsp;&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" nowrap class="usage"><p class="literal"></p>
					</td><td valign="top" nowrap class="requirements">Read-only&nbsp;&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="description">
						<p>Returns an integer value, presumably of a margin setting. But the
element does not feature a corresponding attribute. Ignore this
property.
</p>
												</td>
</tr>
				<tr>
					<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="value"><span class="title">Value</span></td>
				</tr>
				<tr>
					<td colspan="2"><p>			Integer.</p>
					</td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" nowrap colspan="2" class="default"><span class="title">Default</span></td>
				</tr>
				<tr>
					<td colspan="2"><p>			<span class="literal">7</span></p>
					</td>
				</tr>
			</table>
		</div>

		<div id="scrollHeight, scrollWidth">
					<table cellpadding="0" cellspacing="0" border="0" width="100%" class="main">
						<tr><td valign="top" class="name">scrollHeight, scrollWidth</td><td valign="top" nowrap class="compatibility">NN <span class="emphasis">7</span> IE <span class="emphasis">4</span> DOM <span class="emphasis">n/a</span>&nbsp;&nbsp;</td>
						</tr>
						<tr>
							<td valign="top" nowrap class="usage"><p class="literal"></p>
							</td><td valign="top" nowrap class="requirements"><span class="emphasis">Read-only</span>&nbsp;&nbsp;</td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="description"><p>			Originally implemented in IE 4 for elements that either scrolled or
		influenced an element's scroll
		(<span class="literal">body</span>, <span class="literal">button</span>,
		<span class="literal">caption</span>, <span class="literal">div</span>,
		<span class="literal">fieldset</span>, <span class="literal">legend</span>,
		<span class="literal">marquee</span>, and <span class="literal">textarea</span>), these
		properties return the pixel dimensions of an element, including
		elements that are larger than the viewable area in the browser
		window. This is in contrast to the <span class="literal">clientHeight</span>
		and <span class="literal">clientWidth</span> properties for scrollable
		elements, which return dimensions of only visible portions of the
		element. IE for the Macintosh, however, interprets the intent of the
		scroll- properties differently, returning the dimensions of the
		visible portion.
		</p>
									</td>
								</tr>
						<tr>
							<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
						</tr>
								<tr>
									<td colspan="2"><p>			Starting in IE 5 for Windows, all HTML elements have these
		properties, and the values for nonscrolling elements are the same as
		the <span class="literal">offsetHeight</span> and
		<span class="literal">offsetWidth</span> properties. Netscape 7 implements
		these properties for all elements, returning the height and width of
		the element, whether or not it's in view. The
		important point is that for key elements, such as the
		<span class="literal">body</span>, the properties mean different things and can
		disrupt cross-platform operation.
		</p>
									</td>
	</tr>

						<tr>
							<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="example"><span class="title">Example</span></td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
						</tr>
						<tr>
							<td><span class="programlisting"><pre>var midPoint = document.body.scrollHeight/2;</pre>
								</span></td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="value"><span class="title">Value</span></td>
						</tr>
						<tr>
							<td colspan="2"><p>			Positive integer or zero.</p>
							</td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
						</tr>
						<tr>
							<td valign="top" nowrap colspan="2" class="default"><span class="title">Default</span></td>
						</tr>
						<tr>
							<td colspan="2"><p>			None. </p>
							</td>
						</tr>
					</table>
		</div>
		<div id="scrollLeft, scrollTop">
					<table cellpadding="0" cellspacing="0" border="0" width="100%" class="main">
						<tr><td valign="top" class="name">scrollLeft, scrollTop</td><td valign="top" nowrap class="compatibility">NN <span class="emphasis">7</span> IE <span class="emphasis">4</span> DOM <span class="emphasis">n/a</span>&nbsp;&nbsp;</td>
						</tr>
						<tr>
							<td valign="top" nowrap class="usage"><p class="literal"></p>
							</td><td valign="top" nowrap class="requirements"><span class="emphasis">Read/Write</span>&nbsp;&nbsp;</td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="description"><p>			Provide the distance in pixels between the actual left or top edge of
		the element's physical content and the left or top
		edge of the visible portion of the content. Setting these properties
		allows you to use a script to adjust the scrolling of content within
		a scrollable container, such as text in a <span class="literal">textarea</span>
		element or an entire document in the browser window or frame. When
		the content is not scrolled, both values are zero. Setting the
		<span class="literal">scrollTop</span> property to 15 scrolls the document
		upward by 15 pixels in the window; the <span class="literal">scrollLeft</span>
		property is unaffected unless explicitly changed. The property values
		change as the user adjusts the scrollbars. This is important for some
		event-driven positioning tasks in IE for Windows because the
		coordinate system for event offset measurements are with respect to
		the visible area of a page in the browser window. You must add
		<span class="literal">document.body</span> scrolling factors to align event
		coordinates with body content positions (see the element dragging
		example in Chapter 6). Starting with IE 5 for
		Windows, the <span class="literal">scrollLeft</span> and
		<span class="literal">scrollTop</span> properties are available for all HTML
		element objects, but values for unscrollable elements are zero.
		</p>
									</td>
	</tr>

						<tr>
							<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="example"><span class="title">Example</span></td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
						</tr>
						<tr>
							<td><span class="programlisting"><pre>document.body.scrollTop = 40;</pre>
								</span></td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="value"><span class="title">Value</span></td>
						</tr>
						<tr>
							<td colspan="2"><p>			Positive integer or zero.</p>
							</td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
						</tr>
						<tr>
							<td valign="top" nowrap colspan="2" class="default"><span class="title">Default</span></td>
						</tr>
						<tr>
							<td colspan="2"><p>			<span class="literal">0</span></p>
							</td>
						</tr>
					</table>
		</div>
<div id="tabIndex">
			<table cellpadding="0" cellspacing="0" border="0" width="100%" class="main">
				<tr><td valign="top" class="name">tabIndex</td><td valign="top" nowrap class="compatibility">NN <span class="emphasis">6</span> IE <span class="emphasis">4</span> DOM <span class="emphasis">1</span>&nbsp;&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" nowrap class="usage"><p class="literal"></p>
					</td><td valign="top" nowrap class="requirements"><span class="emphasis">Read/Write</span>&nbsp;&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="description">
						<p>This is a number that indicates the sequence of this element within
the tabbing order of all focusable elements in the document. Tabbing
order follows a strict set of rules. Elements that have values other
than zero assigned to their <span class="literal">tabIndex</span> properties
are first in line when a user starts tabbing in a page. Focus starts
with the element with the lowest <span class="literal">tabIndex</span> value
and proceeds in order to the highest value, regardless of physical
location on the page or in the document. If two elements have the
same <span class="literal">tabIndex</span> values, the element that comes
earlier in the document receives focus first. Next come all elements
that either don't support the
<span class="literal">tabIndex</span> property or have the value set to zero.
These elements receive focus in the order in which they appear in the
document.
</p>
							</td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
						</tr>
						<tr>
							<td colspan="2"><p>			The W3C DOM and Netscape 6 limit the <span class="literal">tabIndex</span>
property to the following element objects: <span class="literal">a</span>,
<span class="literal">area</span>, <span class="literal">button</span>,
<span class="literal">input</span>, <span class="literal">object</span>,
<span class="literal">select</span>, <span class="literal">textarea</span>. To this list,
IE 4 adds <span class="literal">applet</span>, <span class="literal">body</span>,
<span class="literal">div</span>, <span class="literal">embed</span>,
<span class="literal">isindex</span>, <span class="literal">marquee</span>,
<span class="literal">span</span>, <span class="literal">table</span>, and
<span class="literal">td</span>. IE 5 adds every other renderable element. A
negative value in IE (only) removes an element from tabbing order
entirely.
</p>
							</td>
						</tr>
						<tr>
							<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
						</tr>
						<tr>
							<td colspan="2"><p>			Links and anchors cannot be tabbed to with the Mac version of IE 4,
so the <span class="literal">tabIndex</span> property for <span class="literal">a</span>
element objects is ignored in that version.
</p>
												</td>
</tr>
				<tr>
					<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="example"><span class="title">Example</span></td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
				</tr>
				<tr>
					<td><span class="programlisting"><pre>document.getElementById("link3").tabIndex = 6;</pre>
						</span></td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="value"><span class="title">Value</span></td>
				</tr>
				<tr>
					<td colspan="2"><p>			Integer.</p>
					</td>
				</tr>
				<tr>
					<td valign="top" colspan="2" class="CLEARSEPARATION">&nbsp;</td>
				</tr>
				<tr>
					<td valign="top" nowrap colspan="2" class="default"><span class="title">Default</span></td>
				</tr>
				<tr>
					<td colspan="2"><p>			<span class="literal">0</span> </p>
					</td>
				</tr>
			</table>
		</div>
</body>
</html>