marquee | NN n/a IE 4 DOM n/a
The marquee object reflects the marquee element.
HTML Equivalent
    <marquee>
Object Model Reference
    [window.]document.getElementById("elementID")
Object-Specific Properties
behavior | bgColor | dataFld | dataFormatAs | dataSrc
direction | height | hspace | loop | scrollAmount
scrollDelay | trueSpeed | vspace | width |
Object-Specific Methods
start( ) | stop( )
Object-Specific Event Handler Properties
Handler | NN | IE | DOM
onbounce | n/a | 4 | n/a
onfinish | n/a | 4 | n/a
onstart | n/a | 4 | n/a

accessKey | NN n/a IE 4 DOM 1
| Read/Write
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., Ctrl, Alt, or Command) with the access key to activate the link. In Windows versions of IE 5 and later and Netscape 6, the Alt key is required and the key is not case-sensitive. For Macintosh versions of IE 5 and later and Netscape 6, the Ctrl modifier key is required to effect the action.
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: a, area, button, input, label, legend, and textarea. To this list, IE 4 adds applet, body, div, embed, isindex, marquee, object, select, span, table, and td (but removes label and legend). IE 5 adds every other renderable element, but with a caution. Except for input and other form-related elements, you must also assign a tabindex attribute or tabIndex 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.
Example
    document.links[3].accessKey = "n";
Value
Single alphanumeric (and punctuation) keyboard character.
Default
Empty string.

">
behavior | NN n/a IE 4 DOM n/a
| Read/Write
Specifies the motion of the content within the rectangular space set aside for the marquee element. You have a choice of three motion types.
Example
    document.getElementById("newsBanner").behavior = "slide";
Value
Case-insensitive marquee element motion types:
alternate Content alternates between marching left and right. scroll Content scrolls (according to the direction attribute) into view and out of view before starting again. slide Content scrolls (according to the direction attribute) into view, stops at the end of its run, blanks, and then starts again.
Default
scroll

bgColor | NN n/a IE 4 DOM n/a
| Read/Write
Background color of the element. This color setting is not reflected in the style sheet backgroundColor property. Even if the bgcolor attribute or bgColor property is set with a plain-language color name, the returned value is always a hexadecimal triplet.
Example
    document.getElementById("myBanner").bgColor = "yellow";
Value
A hexadecimal triplet or plain-language color name. See Appendix A for acceptable plain-language color names.
Default
Inherits body background color.

blur( ) | NN 2 IE 3 DOM 1
Removes focus from the current object, at which time the object's onblur 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 tabindex attribute in Chapter 8). Most reliably for backward compatibility, apply the blur( ) method to blatantly focusable elements, such as text input and textarea elements. Assigning the attribute onfocus="this.blur( );" to a text input 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.
Use blur( ) and focus( ) 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 blur( ) method on one object, some other object (perhaps the window object) receives an onfocus event.
Parameters
None.
Returned Value
None.

clientHeight, clientWidth | NN 7 IE 4 DOM n/a
| Read-only
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 DOCTYPE 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 document.body element). See the Section 9.2 at the beginning of this chapter for details.
Example
    var midHeight = document.body.clientHeight/2;
Value
Integer pixel value.
Default
0

clientLeft, clientTop | NN n/a IE 4 DOM n/a
| Read-only
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 offsetLeft and offsetTop properties (including Netscape 6). For CSS-positioned elements (including changing an element's position), use style object properties, such as left and top, and (in IE only) pixelLeft and pixelTop.
Value
Integer pixel value.
Default
0

dataFld | NN n/a IE 4 DOM n/a
| Read/Write
Used with IE data binding to associate a remote data source column name with the content of the marquee element. A datasrc attribute must also be set for the element. Setting both the dataFld and dataSrc properties to empty strings breaks the binding between element and data source. Works only with text file data sources in IE 5/Mac.
Example
    document.getElementById("myBanner").dataFld = "hotNews";
Value
Case-sensitive string identifier of the data source column.
Default
None.

dataFormatAs | NN n/a IE 4 DOM n/a
| Read/Write
Used with IE data binding, this property advises the browser whether the source material arriving from the data source is to be treated as plain text or as tagged HTML.
Example
    document.getElementById("myBanner").dataFormatAs = "text";
Value
IE recognizes two possible settings: text | html.
Default
text

dataSrc | NN n/a IE 4 DOM n/a
| Read/Write
Used with IE data binding to specify the ID of the page's object element that loads the data source object for remote data access. Setting both the dataFld and dataSrc properties to empty strings breaks the binding between element and data source. Works only with text file data sources in IE 5/Mac.
Example
    document.getElementById("myBanner").dataSrc = "DBSRC3";
Value
Case-sensitive string identifier of the data source.
Default
None.

direction | NN n/a IE 4 DOM n/a
| Read/Write
Specifies the direction of the scroll within the element space.
Example
    document.getElementById("myBanner").direction = "down";
Value
Four possible case-insensitive directions: down | left | right | up.
Default
left

focus( ) | NN 2 IE 3 DOM 1
Gives focus from the current object, at which time the object's onfocus 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 tabindex attribute in Chapter 8). Most reliably for backward compatibility, apply the focus( ) method to blatantly focusable elements, such as text input and textarea elements.
To give a text box focus and pre-select all the text in the box, use the sequence of focus( ) and select( ) 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 setTimeout( ) method following the alert( ) method for the dialog. This allows IE/Windows to sequence statement execution correctly.
Parameters
None.
Returned Value
None.

height, width | NN n/a IE 4 DOM n/a
| Read/Write
Provide the height and width in pixels of the element. Changes to these values are immediately reflected in reflowed content on the page.
Example
    document.getElementById("myBanner").height = 250;
Value
Integer.
Default
None.

hspace, vspace | NN n/a IE 4 DOM n/a
| Read/Write
Provide the pixel measure of horizontal and vertical margins surrounding the element. The hspace property affects the left and right edges of the element equally; the vspace affects the top and bottom edges of the element equally. These margins are not the same as margins set by style sheets, but they have the same visual effect.
Example
    document.getElementById("myBanner").hspace = 5;
    document.getElementById("myBanner").vspace = 8;
Value
Integer of pixel count.
Default
0

loop | NN n/a IE 4 DOM n/a
| Read/Write
Sets the number of times the element scrolls its content. After the final scroll, the content remains in a fixed position. Constant animation can sometimes be distracting to page visitors, so if you have the marquee turn itself off after a few scrolls, you may be doing your visitors a favor.
Example
    document.getElementById("myBanner").loop = 3;
Value
Any positive integer if you want the scrolling to stop after that number of times. Otherwise, set the value to -1.
Default
-1

recordNumber | NN n/a IE 4 DOM n/a
| Read-only
Used with IE data binding, returns an integer representing the record within the data set that generated the element (i.e., an element whose content is filled via data binding). Values of this property can be used to extract a specific record from an Active Data Objects (ADO) record set (see recordset property). Although this property is defined for all IE element objects, the other properties related to data binding belong to a subset of elements.
Example
    <script for="tableTemplate" event="onclick">
    		    myDataCollection.recordset.absoluteposition = this.recordNumber;
    		    ...
    		</script>
Value
Integer.
Default
null

scrollAmount | NN n/a IE 4 DOM n/a
| Read/Write
Specifies the amount of space between positions of each drawing of the content. The greater the space, the faster the text appears to scroll. See also scrollDelay.
Example
    document.getElementById("myBanner").scrollAmount = 4;
Value
Positive integer.
Default
6

scrollDelay | NN n/a IE 4 DOM n/a
| Read/Write
Specifies the amount of time in milliseconds between each drawing of the content. The greater the delay, the slower the text appears to scroll. See also scrollAmount.
Example
    document.getElementById("myBanner").scrollDelay = 100;
Value
Positive integer.
Default
85 (Windows 95); 90 (Macintosh).

scrollHeight, scrollWidth | NN 7 IE 4 DOM n/a
| Read-only
Originally implemented in IE 4 for elements that either scrolled or influenced an element's scroll (body, button, caption, div, fieldset, legend, marquee, and textarea), 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 clientHeight and clientWidth 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.
Starting in IE 5 for Windows, all HTML elements have these properties, and the values for nonscrolling elements are the same as the offsetHeight and offsetWidth 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 body, the properties mean different things and can disrupt cross-platform operation.
Example
    var midPoint = document.body.scrollHeight/2;
Value
Positive integer or zero.
Default
None.

scrollLeft, scrollTop | NN 7 IE 4 DOM n/a
| Read/Write
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 textarea element or an entire document in the browser window or frame. When the content is not scrolled, both values are zero. Setting the scrollTop property to 15 scrolls the document upward by 15 pixels in the window; the scrollLeft 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 document.body 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 scrollLeft and scrollTop properties are available for all HTML element objects, but values for unscrollable elements are zero.
Example
    document.body.scrollTop = 40;
Value
Positive integer or zero.
Default
0

tabIndex | NN 6 IE 4 DOM 1
| Read/Write
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 tabIndex properties are first in line when a user starts tabbing in a page. Focus starts with the element with the lowest tabIndex 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 tabIndex values, the element that comes earlier in the document receives focus first. Next come all elements that either don't support the tabIndex property or have the value set to zero. These elements receive focus in the order in which they appear in the document.
The W3C DOM and Netscape 6 limit the tabIndex property to the following element objects: a, area, button, input, object, select, textarea. To this list, IE 4 adds applet, body, div, embed, isindex, marquee, span, table, and td. IE 5 adds every other renderable element. A negative value in IE (only) removes an element from tabbing order entirely.
Links and anchors cannot be tabbed to with the Mac version of IE 4, so the tabIndex property for a element objects is ignored in that version.
Example
    document.getElementById("link3").tabIndex = 6;
Value
Integer.
Default
0

trueSpeed | NN n/a IE 4 DOM n/a
| Read/Write
Specifies whether the browser should honor scrolldelay attribute settings below 60 milliseconds. The default setting (false) prevents accidental settings that scroll too fast for most readers.
Example
    document.getElementById("myBanner").trueSpeed = "true";
Value
Boolean value: true | false.
Default
false

vspace |
See hspace.

width |
See height.

start( ) | NN n/a IE 4 DOM n/a
Starts the marquee element scrolling if it has been stopped. If the method is invoked on a stopped element, the onstart event handler also fires in response.
Parameters
None.
Returned Value
None.

stop( ) | NN n/a IE 4 DOM n/a
Stops the scrolling of the marquee element. The content remains on the screen in the precise position it was in when the method was invoked. Restart via the start( ) method.
Parameters
None.
Returned Value
None.