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B BGSOUND object (Object/HTML) IE myBGSOUND = myDocument.all.anElementID IE myBGSOUND = myDocument.all.tags(”BGSOUND”) [anIndex] IE myBGSOUND = myDocument.all[aName] -myBGSOUND = myDocument.getElementById (anElementID) -myBGSOUND = myDocument.getElementsByName (aName)[anIndex] JavaScript syntax: -myBGSOUND = myDocument.getElementsByTagName (”BGSOUND”)[anIndex] HTML syntax: anIndex A valid reference to an item in the collection aName The name attribute of an element Argument list: anElementID The ID attribute of an element Object properties: balance,loop,src,volume Event handlers: onClick, onDblClick, onHelp, onKeyDown, onKeyPress, onKeyUp, onMouseDown, onMouseMove, onMouseOut, onMouseOver, onMouseUp This object is instantiated by the HTML tag and represents a sound effect that is to be played in the background. As the BGSOUND object is created during document loading and requires that a sound file be downloaded, there may some noticeable delay before the sound starts to play. See also: Element object Property JavaScript JScript N IE Opera DOM HTML Notes balance 3.0 + 4.0 + - ReadOnly loop 3.0 + 4.0 + - src 3.0 + 4.0 + - volume 3.0 + 4.0 + - ReadOnly Event name JavaScript JScript N IE Opera DOM HTML Notes onClick -3.0 + -4.0 + -4.0 + Warning onDblClick -3.0 + -4.0 + -4.0 + Warning onHelp 3.0 + 4.0 + Warning onKeyDown -3.0 + -4.0 + -4.0 + Warning onKeyPress -3.0 + -4.0 + -4.0 + Warning onKeyUp -3.0 + -4.0 + -4.0 + Warning onMouseDown -3.0 + -4.0 + -4.0 + Warning onMouseMove -3.0 + -4.0 + 4.0 + Warning onMouseOut -3.0 + -4.0 + -4.0 + Warning onMouseOver -3.0 + -4.0 + -4.0 + Warning onMouseUp -3.0 + -4.0 + -4.0 + Warning

JavaScript Programmer’s Reference See also: Element.dir, NOFRAMES.dir, NOSCRIPT.dir BeanConnect (Definition) A Netscape Communications technology for interconnecting Java applets (Beans). See also: Java,Java exception events Refer to: LiveConnect Behavior (Definition) Implementations respond to different constructs according to their behavior. The ECMAScript standard defines how an implementation should react to a language construct. Other non-ECMA-compliant implementations may behave in the same way most of the time and may deviate from the standard at others. When the implementation conforms to the standard, its behavior is predictable according to the definitions of the standard. When an implementation is not conformant, it may behave according to one of the following abnormal behavior models: . Unspecified behavior . Undefined behavior . Implementation-defined behavior . Locale-specific behavior Another meaning for the word behavior in the context of JavaScript is the way that MSIE supports the addition of JavaScript functionality to style definitions. This is covered under the descriptions of the addBehavior() and removeBehavior() methods that belong to the Element object. Compliance, Element.addBehavior(), Element.filters[], Element.removeBehavior(), Implementation-defined behavior,Locale-specific behavior, Undefined behavior, Unspecified behavior See also: BGSOUND object (Object/HTML) An object representing a HTML tag that defines an audio track to play while the page is displayed. Availability: JScript 3.0 Internet Explorer 4.0 (as HTML in IE 3.0) Inherits from: Element object

B BDO.dir (Property) Usage of this is likely to be confined to scripts that operate in multiple-language environments and on pages containing text in more than one language. See also: Element object Property JavaScript JScript N IE Opera DOM HTML Notes dir 5.0 + 5.0 + - Event name JavaScript JScript N IE Opera DOM HTML Notes onClick -5.0 + -5.0 + -4.0 + Warning onDblClick -5.0 + -5.0 + -4.0 + Warning onHelp 5.0 + 5.0 + Warning onKeyDown -5.0 + -5.0 + -4.0 + Warning onKeyPress -5.0 + -5.0 + -4.0 + Warning onKeyUp -5.0 + -5.0 + -4.0 + Warning onMouseDown -5.0 + -5.0 + -4.0 + Warning onMouseMove -5.0 + -5.0 + 4.0 + Warning onMouseOut -5.0 + -5.0 + -4.0 + Warning onMouseOver -5.0 + -5.0 + -4.0 + Warning onMouseUp -5.0 + -5.0 + -4.0 + Warning Inheritance chain: Element object, Node object BDO.dir (Property) The direction attribute of the HTML tag. Availability: JScript 5.0 Internet Explorer 5.0 Property/method value type: String primitive JavaScript syntax: IE myBDO.dir The dir property may be set to indicate a left to right or right to left parsing direction. This is part of the localization support and represents the contents of the DIR=”…” tag attribute. If you assign a value to this property it is case-sensitive and must be either “ltr” or “rtl”. This property works in conjunction with the langproperty to control the direction of text flow.

JavaScript Programmer’s Reference BasicImage() (Filter/visual) Controls over the basic image display attributes of the containing HTML Element object. Availability: JScript 5.5 Internet Explorer 5.5 Refer to: Filter BasicImage() BDO object (Object/HTML) An object representing the HTML tag for supporting bidirectional text algorithms. Availability: JScript 5.0 Internet Explorer 5.0 Inherits from: Element object IE myBDO = myDocument.all.anElementID IE myBDO = myDocument.all.tags(”BDO”) [anIndex] IE myBDO = myDocument.all[aName] -myBDO = myDocument.getElementById (anElementID) -myBDO = myDocument.getElementsByName (aName)[anIndex] JavaScript syntax: -myBDO = myDocument.getElementsByTagName(”BDO”)[anIndex] HTML syntax: … anIndex A valid reference to an item in the collection aName The nameattribute of an element Argument list: anElementID The ID attribute of an element Object properties: dir Event handlers: onClick, onDblClick, onHelp, onKeyDown, onKeyPress, onKeyUp, onMouseDown, onMouseMove, onMouseOut, onMouseOver, onMouseUp This is the Bi-Directional Override object. The LANG and DIR attributes of HTML tags in the document will cover most eventualities but there may be times when you need to explicitly override the direction of text flow.

B BASEFONT.face (Property) BASEFONT.face (Property) The default font face for text affected by the HTML tag. Availability: DOM level 1 JavaScript 1.5 JScript 3.0 Internet Explorer 4.0 Netscape Navigator version 6.0 Property/method value type: String primitive JavaScript syntax: -myBASEFONT.face The font face to be used for subsequent text is defined by this property. It is appropriate to define a list of font faces in priority order in the normal way. The browser will use the first one it encounters that it has available. BASEFONT.size (Property) The default size of text affected by the <> HTML tag. Availability: DOM level 1 JavaScript 1.5 JScript 3.0 Internet Explorer 4.0 Netscape Navigator version 6.0 Property/method value type: String primitive JavaScript syntax: -myBASEFONT.size The size of text rendered by the browser under control of the BASEFONT object is controlled by this property. Absolute and relative sizes are supported in the normal way. Basic type (Definition) Another name for the native types supported by the interpreter. See also: Native object, Primitive value

JavaScript Programmer’s Reference Event name JavaScript JScript N IE Opera DOM HTML Notes onClick 1.5 + 3.0 + 6.0 + 4.0 + -4.0 + Warning onDblClick 1.5 + 3.0 + 6.0 + 4.0 + -4.0 + Warning onHelp 3.0 + 4.0 + Warning onKeyDown 1.5 + 3.0 + 6.0 + 4.0 + -4.0 + Warning onKeyPress 1.5 + 3.0 + 6.0 + 4.0 + -4.0 + Warning onKeyUp 1.5 + 3.0 + 6.0 + 4.0 + -4.0 + Warning onMouseDown 1.5 + 3.0 + 6.0 + 4.0 + -4.0 + Warning onMouseMove 1.5 + 3.0 + 6.0 + 4.0 + 4.0 + Warning onMouseOut 1.5 + 3.0 + 6.0 + 4.0 + -4.0 + Warning onMouseOver 1.5 + 3.0 + 6.0 + 4.0 + -4.0 + Warning onMouseUp 1.5 + 3.0 + 6.0 + 4.0 + -4.0 + Warning Inheritance chain: Element object, Node object BASEFONT.color (Property) The default color of text affected by the HTML tag. Availability: DOM level 1 JavaScript 1.5 JScript 3.0 Internet Explorer 4.0 Netscape Navigator version 6.0 Property/method value type: String primitive JavaScript syntax: -myBASEFONT.color The color of text affected by this BASEFONTobject will be defined in this property. The color can be specified in the normal way according to the HTML color specifiers. See also: Color value, FONT. color

B BASEFONT object (Object/HTML) IE myBASEFONT = myDocument.all.anElementID IE myBASEFONT = myDocument.all.tags(”BASEFONT”)[anIndex] IE myBASEFONT = myDocument.all[aName] -myBASEFONT = myDocument.getElementById (anElementID) -myBASEFONT = myDocument.getElementsByName (aName)[anIndex] JavaScript syntax: -myBASEFONT = myDocument.getElementsByTagName (”BASEFONT”)[anIndex] HTML syntax: anIndex A valid reference to an item in the collection aName The name attribute of an element Argument list: anElementID The ID attribute of an element Object properties: color, face, size Object methods: getAttribute() Event handlers: onClick, onDblClick, onHelp, onKeyDown, onKeyPress, onKeyUp, onMouseDown, onMouseMove, onMouseOut, onMouseOver, onMouseUp Historically web developers will have used the tag to set the attributes of blocks of text. Latterly, they will be using style sheets to control this. The tag provides a way to set the font presentation style from the position of this tag to the end of the document unless overridden by further tags or settings. See also: Element object Property JavaScript JScript N IE Opera DOM HTML Notes color 1.5 + 3.0 + 6.0 + 4.0 + 1 + - face 1.5 + 3.0 + 6.0 + 4.0 + 1 + - size 1.5 + 3.0 + 6.0 + 4.0 + 1 + - Method JavaScript JScript N IE Opera DOM HTML Notes getAttribute() 1.5 + 3.0 + 6.0 + 4.0 + 1 + -