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Index: U

U element: 4.1.6. Text Decoration (Cascading Style Sheets: The Definitive Guide)

(underline) tag: 10.1.2. Text Appearance (Inline Styles) (Web Design in a Nutshell)

10.3.2. Physical Styles (Web Design in a Nutshell)
Appendix A. HTML Elements (Web Design in a Nutshell)
WML: 32.4. WML Elements and Attributes (Web Design in a Nutshell)

UA (see user agent)

UDP (User Datagram Protocol): 5.1. Streaming protocols (Designing Web Audio)

(unordered list) tag: 10.1.4. Lists (Web Design in a Nutshell)

Lists (Web Design in a Nutshell) 10.6.1. Unordered (Bulleted)
Appendix A. HTML Elements (Web Design in a Nutshell)

Ulead

GIF Animator: 23.4.2. GIF Animation Utilities (Web Design in a Nutshell)
GifSmartsaver: 19.5. Tools Overview (Web Design in a Nutshell)

Ultrashock.com: A.1. ActionScript and Programming (ActionScript: The Definitive Guide)

ultrasonic sound: 2.1. The science of sound (Designing Web Audio)

unary negation ( ) operator: 5.3.8. Unary Negation (ActionScript: The Definitive Guide)

unary operators: 5.1.2. Number of Operands (ActionScript: The Definitive Guide)

undefined datatype: 3.2.1. The ActionScript Datatypes (ActionScript: The Definitive Guide)

4.8. Undefined (ActionScript: The Definitive Guide)
equality rules for: 5.4.1. Primitive Datatype Equality (ActionScript: The Definitive Guide)

underflow conditions: 20.5. Alphabetical Language Reference (ActionScript: The Definitive Guide)

underline ( ) tag: 10.1.2. Text Appearance (Inline Styles) (Web Design in a Nutshell)

10.3.2. Physical Styles (Web Design in a Nutshell)
Appendix A. HTML Elements (Web Design in a Nutshell)

underlined text

in CSS: 17.5.1. Type-Related Properties (Web Design in a Nutshell)
hyperlinks: 11.4.4. Turning Off Underlines (Web Design in a Nutshell)

underlined text (HTML support in text fields): 18.5.3. <U> (Underline) (ActionScript: The Definitive Guide)

underlining: 4.1.6. Text Decoration (Cascading Style Sheets: The Definitive Guide)

changing color of: 4.1.6.1. Weird decorations (Cascading Style Sheets: The Definitive Guide)
removing from hyperlinks: 4.1.6. Text Decoration (Cascading Style Sheets: The Definitive Guide)
turned off by browsers: 4.1.6.1. Weird decorations (Cascading Style Sheets: The Definitive Guide)

underscore ( _ ): 8.2.3. Attributes (Web Design in a Nutshell)

underscores in built-in clip properties: 20.5. Alphabetical Language Reference (ActionScript: The Definitive Guide)

underscoring: 4.5.11. The <u> Tag (Deprecated) (HTML & XHTML: The Definitive Guide)

8.4.5.4. The text-decoration property (HTML & XHTML: The Definitive Guide)

unescape( ) global function: 20.5. Alphabetical Language Reference (ActionScript: The Definitive Guide)

Unicode

escape sequences: 4.5.1. Character Encoding (ActionScript: The Definitive Guide)

4.5.2.3. Unicode-style escape sequences (ActionScript: The Definitive Guide)
B. Latin 1 Character Repertoire and Keycodes (ActionScript: The Definitive Guide)

not supported in ActionScript: 4.5.1. Character Encoding (ActionScript: The Definitive Guide)

unicode-bidi property in CSS2 for multilingualism: 7.3. Style Sheets Language Features (Web Design in a Nutshell)

Unicode character set: 7.1.2. 16-Bit Encoded Character Sets (Web Design in a Nutshell)

Uniform Palette: 22.2. Converting to the Web Palette (Web Design in a Nutshell)

Uniform Resource Identifier (URI): 3.5. CSS2 Units (Cascading Style Sheets: The Definitive Guide)

Uniform Resource Locators (see URLs)

unique identifiers (IDs)

articles in newsgroups: 6.2.7.2. The nntp newsgroup and article (HTML & XHTML: The Definitive Guide)
messages on news servers: 6.2.6.2. Accessing single messages (HTML & XHTML: The Definitive Guide)

Unisys company: 19.3. GIF Compression (Web Design in a Nutshell)

units: 11.1.3. Case 3: Putting a Magazine Article Online (Cascading Style Sheets: The Definitive Guide)

(see also length units; CSS2 units)
for aural style sheets: 3.5. CSS2 Units (Cascading Style Sheets: The Definitive Guide)
avoiding mixing: 11.1.3. Case 3: Putting a Magazine Article Online (Cascading Style Sheets: The Definitive Guide)
color: 3.6. Summary (Cascading Style Sheets: The Definitive Guide)

units attribute ( ): 12.1. Summary of Object Placement Tags (Web Design in a Nutshell)

12.2.4.8. The units attribute (HTML & XHTML: The Definitive Guide)

Unity DS-1 software: 10.1.1. Advantages to using the MIDI format (Designing Web Audio)

universal child selectors: 8.2.4. Universal, Child, and Adjacent Selectors (HTML & XHTML: The Definitive Guide)

universal selector: 10.2.1.1. Universal selector (Cascading Style Sheets: The Definitive Guide)

Unix: 5.2.2. Windows Media Technologies (Netshow) (Designing Web Audio)

RealServer, installing: 6.3.3.1. RealServer installation (Designing Web Audio)

Unix systems

Flash movies (unsupported): 26.1.2. Disadvantages (Web Design in a Nutshell)
web palette for: 3.3.2. Color in Browsers ( The Web Palette) (Web Design in a Nutshell)

unknown value for WML attribute: 32.3.6. Programming Softkeys (Web Design in a Nutshell)

unload movie clip event: 10.10.3. unload (ActionScript: The Definitive Guide)

unload movie clip event handler: 10.10.3. unload (ActionScript: The Definitive Guide)

20.5. Alphabetical Language Reference (ActionScript: The Definitive Guide)
order of execution: 10.12. Order of Execution (ActionScript: The Definitive Guide)

unloadMovie( )

global function: 20.5. Alphabetical Language Reference (ActionScript: The Definitive Guide)

target parameter and: 13.8.3.1. Method versus global function overlap issues (ActionScript: The Definitive Guide)

MovieClip class: 13.8.3. Built-in Movie Clip Methods (ActionScript: The Definitive Guide)

20.5. Alphabetical Language Reference (ActionScript: The Definitive Guide)
20.5. Alphabetical Language Reference (ActionScript: The Definitive Guide)

removing contents of clip instances: with instances (ActionScript: The Definitive Guide) 13.6.1.2. Using unloadMovie( )

removing levels in document stacks: with Instances and Levels (ActionScript: The Definitive Guide) 13.6.1. Using unloadMovie( )

unloadMovieNum( ) global function: 20.5. Alphabetical Language Reference (ActionScript: The Definitive Guide)

unnamed form parameters: 9.12.2.2. Using unnamed parameters with GET applications (HTML & XHTML: The Definitive Guide)

unordered (bulleted) lists: Lists (Web Design in a Nutshell) 10.6.1. Unordered (Bulleted)

7.1. Unordered Lists (HTML & XHTML: The Definitive Guide)

bullet shape: 7.3.1.1. The type attribute (HTML & XHTML: The Definitive Guide)

custom list item markers: 17.3. Custom Bullets (HTML & XHTML: The Definitive Guide)

list marker style properties: 8.4.7.1. The list-style-image property (HTML & XHTML: The Definitive Guide)

nesting: 10.6.4.1. Nesting unordered lists (Web Design in a Nutshell)

7.4.1. Nested Unordered Lists (HTML & XHTML: The Definitive Guide)

tag and: 10.1.4. Lists (Web Design in a Nutshell)

Appendix A. HTML Elements (Web Design in a Nutshell)

using appropriately: 7.6. Appropriate List Usage (HTML & XHTML: The Definitive Guide)

unordered lists: 7.7.1. Types of Lists (Cascading Style Sheets: The Definitive Guide)

2.9.1. Unordered, Ordered, and Definition Lists (HTML & XHTML: The Definitive Guide)
directory lists: 7.7. Directory Lists (HTML & XHTML: The Definitive Guide)

unordered lists, CSS properties: 17.5.4. Classification Properties (Web Design in a Nutshell)

unsafe characters in URLs: 6.2.1.1. Handling reserved and unsafe characters (HTML & XHTML: The Definitive Guide)

unshift( ) (Array class): method (ActionScript: The Definitive Guide) 11.7.3.2. The unshift( )

20.5. Alphabetical Language Reference (ActionScript: The Definitive Guide)

unsigned right shift assignment (>>>=) operator: 5.1.3. Operator Precedence (ActionScript: The Definitive Guide)

unsigned right shift (>>>) operator: 15.2.5.2. Unsigned right shift (ActionScript: The Definitive Guide)

Unspecified disposal method: 23.5.3. Disposal Methods (Web Design in a Nutshell)

unvisited anchors: 2.4.1. Pseudo-Class Selectors (Cascading Style Sheets: The Definitive Guide)

unvisited link state: 8.3.4.1. Hyperlink pseudo-classes (HTML & XHTML: The Definitive Guide)

UP property (Key object): 20.5. Alphabetical Language Reference (ActionScript: The Definitive Guide)

update statements in loops: 8.1. The while Loop (ActionScript: The Definitive Guide)

8.2. Loop Terminology (ActionScript: The Definitive Guide)

updateAfterEvent( ) global function: 20.5. Alphabetical Language Reference (ActionScript: The Definitive Guide)

refreshing the screen with: 10.14. Refreshing the Screen with updateAfterEvent (ActionScript: The Definitive Guide)
simulating a custom mouse pointer: 10.17. Event Handlers Applied (ActionScript: The Definitive Guide)

uploading documents via FTP: 4.4. Uploading Documents (FTP) (Web Design in a Nutshell)

uppercase text: 4.1.5. Text Transformation (Cascading Style Sheets: The Definitive Guide)

uppercase versions of strings, creating: function (ActionScript: The Definitive Guide) 4.6.8.1. The toUpperCase( )

20.5. Alphabetical Language Reference (ActionScript: The Definitive Guide)

upright text: 5.4.1. Fonts with Style (Cascading Style Sheets: The Definitive Guide)

URI (Uniform Resource Identifier): 3.5. CSS2 Units (Cascading Style Sheets: The Definitive Guide)

_url property (MovieClip class): 13.7. Built-in Movie Clip Properties (ActionScript: The Definitive Guide)

13.7. Built-in Movie Clip Properties (ActionScript: The Definitive Guide)
20.5. Alphabetical Language Reference (ActionScript: The Definitive Guide)
20.5. Alphabetical Language Reference (ActionScript: The Definitive Guide)

URLs (uniform resource locators): 2.7.1. URLs (HTML & XHTML: The Definitive Guide)

6.2. Referencing Documents: The URL (HTML & XHTML: The Definitive Guide)

absolute vs. relative: 6.2.11. Absolute and Relative URLs (HTML & XHTML: The Definitive Guide)

tag: 6.7.1. The <base> Header Element (HTML & XHTML: The Definitive Guide)

character encodings in: 6.2.1. Writing a URL (HTML & XHTML: The Definitive Guide)

file URLs: 6.2.5. The file URL (HTML & XHTML: The Definitive Guide)

form parameters in: 9.2.4.2. Passing parameters explicitly (HTML & XHTML: The Definitive Guide)

9.12.2.1. Using named parameters with GET applications (HTML & XHTML: The Definitive Guide)

ftp URLs: 6.2.4. The ftp URL (HTML & XHTML: The Definitive Guide)

generating randomly: 13.2.4.1. A random URL generator (HTML & XHTML: The Definitive Guide)

gopher URLs: 6.2.10. The gopher URL (HTML & XHTML: The Definitive Guide)

http URLs: 6.2.2. The http URL (HTML & XHTML: The Definitive Guide)

JavaScript pseudo-protocol: 6.2.3. The javascript URL (HTML & XHTML: The Definitive Guide)

javascript pseudo-URLs: 12.3.4. JavaScript URLs (HTML & XHTML: The Definitive Guide)

mailto URLs: 6.2.8. The mailto URL (HTML & XHTML: The Definitive Guide)

9.2.2. The enctype Attribute (HTML & XHTML: The Definitive Guide)
9.4. Using Email to Collect Form Data (HTML & XHTML: The Definitive Guide)
defining mail header fields: 6.2.8.1. Defining mail header fields (HTML & XHTML: The Definitive Guide)

news and nntp URLs: 6.2.6. The news URL (HTML & XHTML: The Definitive Guide)

query URLs: 6.6.1.2. The query URL (HTML & XHTML: The Definitive Guide)

as style property values: 8.4.1.4. URL property values (HTML & XHTML: The Definitive Guide)

telnet URLs: 6.2.9. The telnet URL (HTML & XHTML: The Definitive Guide)

usability of sites: 1.2.2.3. Utility (Information Architecture for the World Wide Web)

ability to find information: 1.2.1.1. Can't find it (Information Architecture for the World Wide Web)

1.2.2.4. "Findability" (Information Architecture for the World Wide Web)

testing: 9.6. Learning from Users (Information Architecture for the World Wide Web)

usability engineering: 2.2.3.4. Usability engineering (Information Architecture for the World Wide Web)

usage analysis reporting: 5.2.2. Windows Media Technologies (Netshow) (Designing Web Audio)

usage tracking: 9.6.4. Usage Tracking (Information Architecture for the World Wide Web)

usemap attribute: B. List of Attributes (Web Design in a Nutshell)

2.8.2. Image Maps (HTML & XHTML: The Definitive Guide)
5.2.6.14. The ismap and usemap attributes (HTML & XHTML: The Definitive Guide)
6.5.2. Client-Side Image Maps (HTML & XHTML: The Definitive Guide)
12.2.1.10. The shapes and usemap attributes (HTML & XHTML: The Definitive Guide)

Usenet news system: 6.2.6. The news URL (HTML & XHTML: The Definitive Guide)

user agent strings: 1.2.1.1. Server log analysis (Web Design in a Nutshell)

user agent (UA): 2.2.2. Grouping Declarations (Cascading Style Sheets: The Definitive Guide)

2.2.2. Grouping Declarations (Cascading Style Sheets: The Definitive Guide)
(see also browsers)

user and password, telnet URLs: 6.2.9.1. The telnet user and password (HTML & XHTML: The Definitive Guide)

User Datagram Protocol (see UDP)

user events: 10.3. Types of Events (ActionScript: The Definitive Guide)

adding code to buttons: 16.3. Adding Scripts to Buttons (ActionScript: The Definitive Guide)

user-input movie clip events: 10.11. The User-Input Movie Clip Events (ActionScript: The Definitive Guide)

updateAfterEvent( ) and: 10.14. Refreshing the Screen with updateAfterEvent (ActionScript: The Definitive Guide)

20.5. Alphabetical Language Reference (ActionScript: The Definitive Guide)

user interface design: 9.11.3. User Interface Considerations (HTML & XHTML: The Definitive Guide)

user-related event handlers: 12.3.3.1. Standard event handler attributes (HTML & XHTML: The Definitive Guide)

users (see audiences)

users, selecting alternate style sheets: 1.4.1.2. Alternate style sheets (Cascading Style Sheets: The Definitive Guide)

UTC (Coordinated Universal Time): 20.5. Alphabetical Language Reference (ActionScript: The Definitive Guide)

getTimezoneOffset( ) and: 20.5. Alphabetical Language Reference (ActionScript: The Definitive Guide)
getUTCDate( ) and: 20.5. Alphabetical Language Reference (ActionScript: The Definitive Guide)
getUTCDay( ) and: 20.5. Alphabetical Language Reference (ActionScript: The Definitive Guide)
getUTCFullYear( ) and: 20.5. Alphabetical Language Reference (ActionScript: The Definitive Guide)
getUTCHours( ) and: 20.5. Alphabetical Language Reference (ActionScript: The Definitive Guide)
getUTCMilliseconds( ) and: 20.5. Alphabetical Language Reference (ActionScript: The Definitive Guide)
getUTCMinutes( ) and: 20.5. Alphabetical Language Reference (ActionScript: The Definitive Guide)
getUTCMonth( ) and: 20.5. Alphabetical Language Reference (ActionScript: The Definitive Guide)
getUTCSeconds( ) and: 20.5. Alphabetical Language Reference (ActionScript: The Definitive Guide)

UTC( ) (Date class): 20.5. Alphabetical Language Reference (ActionScript: The Definitive Guide)

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