JavaScript: The Complete Reference, Second Edition
F
favlets, Web browsers, 19
feature parameter, Window object, 354 “358
fieldset object, HTMLFieldSetElement, 818
fieldset, forms, 443
<fieldset>, 443, 818
FIFO (first-in first out), 165
file object, HTMLInputElement, 818 “819
file upload fields, forms, 436
file upload object, HTMLInputElement, 818 “819
FileSystemObject
ActiveX, 656 “657
HTA and, 659
overview of, 819
filters, CSS, 654 “655
fireEvent( ) method, 329
first-in first out (FIFO), 165
flags, regular expressions, 749
floating-point numbers , 49, 52
flow control
labels and, 106 “108
statements, 36 “37, 97
syntax, 744
focus events, 426
focus( ) method, Document object, 362, 456
font object, HTMLFontElement, 819 “820
<font>, 819
for loops
overview of, 37 “38
semicolon placement and, 105
syntax, 104 “105, 747
for...in statements, 109 “110
for/in loops
iterating elements of associative
arrays, 150
iterating object properties, 138 “141
overview of, 37
syntax of, 747
form fields, 421 “444
accessing, 419 “421
buttons , 423 “426
checkboxes, 431 “435
disabling, 457 “458
field selection, 456
fieldset, 443
file upload fields, 436
first field focus, 456
hidden fields, 435
input element properties, 421 “423
label element, 442 “443
legend, 443 “444
radio buttons, 431 “435
select menus , 437 “442
text fields, 426 “431
form object, HTMLFormElement, 820
Form object, HTMLFormElement
elements collection, 393 “394
overview of, 820
properties, 417 “419
form validation, 444 “455
abstracting , 446 “449
best practices, 454 “455
defined, 417
drop-in, 449 “451
keyboard masking, 453 “454
need for, 417
onchange event handlers, 452 “453
overview of, 444 “446
via hidden fields, 452
<form>
accessing document elements by position, 230
correspondence to Form/form object, 417 “418, 820
Document object and, 393
forms, 417 “461
accessing, 419 “421
disabling fields, 457 “458
dynamic, 458 “461
first field focus of, 456
Form object properties, 417 “419
input. see <input>
labels and field selection, 456
need for form validation, 417
status messages, 456, 457
forms[ ] collection, 392 “393, 419
frame busting, 378
Frame object, browser objects, 822
frame object, HTMLFrameElement, 821
<frame>, 375 “376, 821
communication with, 584
correspondence to iframe object, 828 “829
same-origin policy and, 681
two-way remote communication with, 595 “597
frames , 371 “381
building, 378 “379
busting, 378
inline, 375 “376
loading, 377
overview of, 371 “375
relationships, 374
state management with, 379 “381
frameSet object, HTMLFrameSetElement, 822
<frameset>, 822
full-screen windows , Window object extensions, 383 “384
function keyword, 39, 111
function literals, 122 “124, 738
Function object, built-in objects, 121 “122, 823 “824
functions, 111 “132
anonymous, 124
best practices for use of, 128 “131
defining, 111
function literals, 122 “124
global and local variables and, 117 “119
globally available, 179
invoking, 63
local, 120 “121
mask outs and, 119 “120
as objects, 121 “122
overview of, 39
parameter passing, 112 “113
parameter passing, advanced, 125 “127
passing composite types by reference, 115 “116
passing objects to, 143 “144
passing primitive types by value, 114 “115
recursive, 127 “128
reference types and, 116 “117
return statements, 114
static variables, 124 “125
syntax, 745
variable scope and, 70 “72