valid documents, explanation of, 551
valid XML, overview of, 552-555. See also well-formed XML; XML (Extensible Markup Language);
validation. See also form validation
benefit of, 45-47
of blinking text, 260
validation error message, example of, 554
value attribute
using with Reset and Submit buttons on forms, 384
using with textarea element and forms, 375-376
<var> (variable) element, overview of, 731-732
variables, declaring in JavaScript, 446
VBScript, overview of, 435-436
vcard_name attribute, using for form accessibility, 395-396
vertical-align CSS1 text property, overview of, 299
vestigial lists, examples of, 75-76
video
including, 255-256
overview of, 255-260
/video directory, contents of, 542
video files, syntax for, 256
video formats, table of, 255
visibility property in CSS2, overview of, 337-338
visible value of CSS2 visibility property, explanation of, 337-338
Visited link state, explanation of, 112
visual acceptance testing, performing for Web site projects, 50
visual design, HTML approach toward, 171-180
vlink attribute, changing, 110, 191
VML (Vector Markup Language) format, explanation of, 264
voice-family property in CSS2, overview of, 354
volume attribute
using with <bgsound> tag, 250-251
using with QuickTime, 259
volume property in CSS2, overview of, 355
vspace attribute
imitating with style sheets, 322-324
using with images, 158-159
using with QuickTime, 259