- Table of Contents
- U object — An object that represents the font style controlled by the <U> HTML tag.
- UDI — Universal Document Identifier.
- UIEvent object — This is part of the DOM level 2 user interface event set.
- UIEvent.detail — Some detailed information about the Event object is made available as a numeric value.
- UIEvent.initUIEvent() — After creating a UIEvent object with document.createEvent(), it must be initialized with this method call.
- UIEvent.view — A reference to the AbstractView object that generated the event.
- UL object — An object that encapsulates an unordered list in a <UL> tag.
- UL.compact — A switch that compacts the unordered list content to occupy less space on the screen.
- UL.type — A control for the type of listing style that is presented.
- Unary expression — An operator prefixing an operand.
- Unary operator — An operator that requires only one operand to create an expression.
- undefined — A literal constant whose type is a built-in primitive value.
- Undefined behaviour — Erroneous operations not described in the standard.
- undefined type — A native built-in type.
- Undocumented features — Aside from the features covered in official documentation, browsers support many other hidden capabilities.
- unescape() — Un-URL-escape a string.
- Unicode — A character encoding standard.
- Universal coordinated time — A universal standard time that is synchronized to GMT.
- UniversalBrowserAccess — A combination of both read and write access.
- UniversalBrowserRead — A privilege to grant read access to browser internals.
- UniversalBrowserWrite — A privilege that grants the ability to write to internal browser values.
- UniversalFileRead — A privilege to grant access to read a file in the file system.
- UniversalPreferencesRead — A privilege that allows access to preferences information.
- UniversalPreferencesWrite — A privilege that grants the ability to change preferences settings.
- UniversalSendMail — A privilege that grants the permission to send mail.
- Unspecified behavior — Correct behavior that is not specified in the standard.
- untaint() — A deprecated method for controlling secure access to data values.
- unwatch() — Un-set a watch-point for a named property of an object.
- URI — A Uniform Resource Identifier.
- URI handling functions — ECMA edition 3 describes a set of functions it refers to as URI handling properties.
- URIError object — A native error object based on the Error object.
- URL — A Uniform Resource Locator.
- Url object — An object that represents URLs in Netscape but which has extensions in MSIE.
- Url.charset — The character set of the document pointed at by the HREF="..." HTML tag attribute of an anchor.
- Url.coords — The co-ordinates on screen where the object represented by the URL is located.
- Url.hash — The hash delimited item at the end of an HREF URL if there is one.
- Url.host — The hostname and port number of an HREF URL if there is one.
- Url.hostname — The hostname of an HREF URL if there is one.
- Url.href — The complete HREF of an HREF URL if there is one.
- Url.hreflang — The language that the document at the HREF location is coded in.
- Url.Methods — A collection of methods belonging to the URL.
- Url.mimeType — The MIME type used to access the document pointed at by the URL.
- Url.name — In MSIE, the Url.name property is another way to access the anchor.name property.
- Url.nameProp — The filename portion of the URL value.
- Url.pathname — The pathname portion of an HREF URL if there is one.
- Url.port — The port value of an HREF URL if there is one.
- Url.protocol — The protocol value of an HREF URL if there is one.
- Url.protocolLong — A long, human readable description of the protocol.
- Url.rel — The relationship of this element to the document pointed at by the URL.
- Url.rev — The relationship of the document pointed at by the URL to this element.
- Url.search — The query portion of an HREF URL if there is one.
- Url.shape — The shape of an area in an image map that this URL is associated with.
- Url.target — The target attribute of an <A> tag if there is one.
- Url.text — The text that appears between the <A> and </A> tags.
- Url.type — The MIME type of the document that the URL points at.
- Url.urn — A URN value derived from the URL.
- Url.x — The X co-ordinate of a link.
- Url.y — The Y co-ordinate of a link.
- URN — A Uniform Resource Name.
- User-generated object — An object created under script control.
- userDefined object — You can define your own objects in several different ways.
- userProfile object — An object that encapsulates a user's profile within the system.
- userProfile.addReadRequest() — Adds a request to read a property of the user profile. These are queued up to have permission requested from the user.
- userProfile.clearRequest() — Clear all read requests from the queue.
- userProfile.doReadRequest() — Execute the current queue of read requests, asking the user for permission to access these properties of the profile.
- userProfile.getAttribute() — Get an attribute of the vCard object.
- UTC — Universel Temps Cordonne.
- Utility objects — Netscape Enterprise Server provides server-side utility objects to give assistance when running server-side JavaScript.
