1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en-US">
<title>Scripts [Robin’s HTML 4.0 Conformance Test]</title>
<meta name="description" content="Test your Web browser’s support for scripting elements. Part of Robin’s HTML 4.0 Conformance Test.">
<meta name="keywords" content="scripts, JavaScript, ECMAScript, VBScript, tcl, perlscript, COBOLScript, MIME types, application/x-javascript, application/javascript, application/ecmascript, text/javascript, text/ecmascript, noscript, defer">
<meta name="DC.Creator" content="Lionheart, Robin">
<link rel="home" href="http://www.robinlionheart.com/" title="RobinLionheart.com">
<link rel="first" href="./" title="Robin’s HTML 4.0 Test">
<link rel="prev" href="quote" title="Quotations">
<link rel="next" href="tables" title="Tables">
<link rel="glossary" href="glossary" title="Glossary">
<link rel="author" href="http://www.robinlionheart.com/robin/" title="Robin Lionheart">
<link rel="stylesheet" href="/style/linkcolors.css" type="text/css" media="screen, tv, projection">
<link rel="stylesheet" href="html4.css" type="text/css" media="screen, tv, projection" title="Conformance Test">
<link rel="icon" href="/images/icons/htmltest.png" type="image/png">
<div id="navbar">
<ul class="nl" id="breadcrumbs"><li><a href="./" rel="first">Robin’s HTML 4.0 Test</a><ul><li>Scripts</li></ul></li></ul>
<ul class="nl">
<li><a href="./" rel="first" accesskey="1" title="First: Robin’s HTML 4.0 Test">⇤<strong>1</strong>st</a></li>
<li><a href="quote" rel="prev" accesskey="P" title="Prior: Quotations">←<strong>P</strong>rior</a></li>
<li><a href="tables" rel="next" accesskey="N" title="Next: Tables"><strong>N</strong>ext→</a></li>
</ul>
</div>
<h1>Scripts (<a class="specsect" href="http://www.w3.org/TR/html4/interact/scripts.html" title="HTML 4.0 Specification">§18</a>)</h1>
<div class="section" id="noscript">
<h2>Noscript nitpicking (<a class="specsect" href="http://www.w3.org/TR/html4/interact/scripts.html#h-18.3.1" title="HTML 4.0 Specification">§18.3.1</a>)</h2>
<div class="bodytext">
<p>An <abbr>HTML</abbr> 4.0 compliant Web browser that cannot render scripts <em>must</em> render contents of a <dfn><a class="specsect" href="http://www.w3.org/TR/html4/interact/scripts.html#edef-noscript" title="HTML 4.0 Specification: 18 Scripts"><code class="element"><noscript></code></a></dfn> element. Compliant Web browsers that can render scripts <em>should</em> render contents of a <code class="element"><noscript></code> element when scripting is disabled.</p>
<p>The standard also says Web browsers should render <code class="element"><noscript></code> after a script it could not render earlier in a document. <span class="note">This feature is of questionable desirability, and is rarely observed in practice.</span></p>
</div>
<div class="illo">
<h3>Example:</h3>
<div class="blockcode">
<em class="html"><script <strong class="tested">type="application/x-fakescript"</strong>></em><!--<br>
<div class="indent">
// There is no such thing as FakeScript.<br>
alert("I should not be running a FakeScript script!");<br>
document.writeln('<p><em>This Web browser executed a FakeScript script.<\/em><\/p>');<br>
// --><br>
</div>
<em class="html"></script></em><br>
<em class="html4"><strong class="tested"><noscript></strong></em><br>
<div class="indent">
<em class="html"><p></em>Technically, your Web browser should render this line whether or not scripting is enabled.<em class="html"></p></em><br>
</div>
<em class="html4"><strong class="tested"></noscript></strong></em>
</div>
<h4 class="resultheader">Your Web browser renders it like this:</h4>
<div class="results" id="result1">
<script type="application/x-fakescript"><!--
// There is no such thing as FakeScript.
alert("I should not be running a FakeScript script!");
document.writeln("<p><em>This Web browser executed a FakeScript script.<\/em><\/p>");
// -->
</script>
<noscript>
<p>Technically, your Web browser should render this line whether or not scripting is enabled.</p>
</noscript>
</div>
</div>
</div>
<div class="section" id="type">
<h2>Content types</h2>
<div class="bodytext">
<p>The <a class="specsect" href="http://www.w3.org/TR/html4/interact/scripts.html#adef-type-SCRIPT" title="HTML 4.0 Specification: 18 Scripts"><code class="attribute">type</code></a> attribute specifies the <a href="glossary#content_type" class="local" title="Glossary" rel="glossary">content type</a> of a script (that is, what language the script is in).</p>
<p class="note">On 27 June 2005, the <abbr>IETF</abbr> has at last <a href="http://www1.ietf.org/mail-archive/web/ietf-announce/current/msg01349.html">registered content types for JavaScript</a>, <strong><code class="content_type">application/javascript</code></strong>, <strong><code class="content_type">application/ecmascript</code></strong>, <strong><code class="content_type">text/javascript</code></strong> (marked obsolete), and <strong><code class="content_type">text/ecmascript</code></strong> (marked obsolete). Examples in the <abbr>HTML</abbr> 4.0 specification incorrectly used then‐unregistered content type <code class="content_type">text/javascript</code> for JavaScript instead of well‐established though unofficial content type <strong><code class="content_type">application/x-javascript</code></strong>. Using a subtype of <code class="content_type">text</code> for code to be executed instead of text for humans to read was a mistake and can cause problems. Examples also incorrectly use <code class="content_type">text/vbscript</code> (instead of <code class="content_type">application/x-vbscript</code>) and <code class="content_type">text/tcl</code> (instead of <code class="content_type">application/x-tcl</code>).</p>
<p class="note">The <code class="attribute">type</code> attribute replaces the ill‐defined <code class="attribute">language</code> attribute used by older browsers. <abbr>HTML</abbr> 4.0 simultaneously introduces <code class="attribute">language</code> for compatibility, and deprecates it in favor of <code class="attribute">type</code>.</p>
</div>
<div class="illo">
<h3>Example:</h3>
<div class="blockcode">
<em class="html"><div <em class="html4">id="validtypes"</em>></em><br>
<div class="indent">
<em class="html"><p></em>This Web browser executes scripts with these valid content types:<em class="html"></p></em><br>
<br>
<em class="html"><script <strong class="tested">type="application/javascript"</strong>></em><!--<br>
<div class="indent">
// Correct but rarely supported type for JavaScript<br>
if (document.createTextNode) {<br>
<div class="indent">
// the standards-compliant DOM way<br>
var newPara = document.createElement("p");<br><br>
var textNode = document.createTextNode("\u2022 ");<br>
newPara.appendChild(textNode);<br><br>
var codeNode = document.createElement("code");<br>
newPara.appendChild(codeNode);<br><br>
textNode = document.createTextNode("application/javascript");<br>
codeNode.appendChild(textNode);<br><br>
var div = document.getElementById("validtypes");<br>
div.appendChild(newPara);<br>
</div>
} else {<br>
<div class="indent">
// the old DHTML way<br>
document.writeln("<p><em class="html4"><em class="entity">&bull;</em></em> <code>application/javascript<\/code> <i>(without the <abbr>DOM<\/abbr>)<\/i><\/p>");<br>
</div>
}<br>
// --><br>
</div>
<em class="html"></script></em><br>
<em class="html"><script <strong class="tested">type="application/ecmascript"</strong>></em><!--<br>
<div class="indent">
// Correct but rarely supported type for ECMAscript<br>
// Proposed by ECMAScript standard<br>
var newPara = document.createElement("p");<br><br>
var textNode = document.createTextNode("\u2022 ");<br>
newPara.appendChild(textNode);<br><br>
var codeNode = document.createElement("code");<br>
newPara.appendChild(codeNode);<br><br>
textNode = document.createTextNode("application/ecmascript");<br>
codeNode.appendChild(textNode);<br><br>
var div = document.getElementById("validtypes");<br>
div.appendChild(newPara);<br>
// --><br>
</div>
<em class="html"></script></em><br>
<em class="html"><script <strong class="tested">type="application/x-vbscript"</strong>></em><!--<br>
<div class="indent">
' Correct unregistered type for VBScript<br>
option explicit<br>
dim newPara, textNode, codeNode, div<br><br>
set newPara = document.createElement("p")<br>
set textNode = document.createTextNode(ChrW(&H2022) + " ")<br>
newPara.appendChild(textNode)<br><br>
set codeNode = document.createElement("code")<br>
newPara.appendChild(codeNode)<br><br>
set textNode = document.createTextNode("application/x-vbscript")<br>
codeNode.appendChild(textNode)<br><br>
set div = document.getElementById("validtypes")<br>
div.appendChild(newPara)<br>
' --><br>
</div>
<em class="html"></script></em><br>
<em class="html"><script <strong class="tested">type="application/x-tcl"</strong>></em><!--<br>
<div class="indent">
# Correct unregistered media type for Tcl.<br>
# I know of no Web browsers that run Tcl.<br>
document writeln "<p><em class="html4"><em class="entity">&bull;</em></em> <i><code>text/tcl<\/code><\/i><\/p>"<br>
# --><br>
</div>
<em class="html"></script></em><br>
<em class="html"><script <strong class="tested">type="application/x-perlscript"</strong>></em><!--<br>
<div class="indent">
# Correct unregistered media type for PerlScript<br>
# I know of no Web browsers that run PerlScript,<br>
# but some Web servers can generate page content with it.<br>
$window->document->writeln("<p><em class="html4"><em class="entity">&bull;</em></em> <code>application/x-perlscript<\/code><\/p>");<br>
# --><br>
</div>
<em class="html"></script></em><br>
<em class="html"><script <strong class="tested">type="application/x-cobolscript"</strong>></em><!--<br>
<div class="indent">
* You youngsters are so spoiled.<br>
* Back in the day, we wrote Web pages on punched cards...<br>
IDENTIFICATION DIVISION.<br>
PROGRAM-ID. Test_COBOLScript.<br>
DATA DIVISION.<br>
WORKING-STORAGE DIVISION.<br>
PROCEDURE DIVISION.<br>
<div class="indent">
INVOKE HOST "document.write" USING BY VALUE "<p><em class="html4"><em class="entity">&bull;</em></em> <code>application/x-cobolscript<".<br>
INVOKE HOST "document.write" USING BY VALUE "/code><".<br>
INVOKE HOST "document.write" USING BY VALUE "/p>"<br>
</div>
END PROGRAM.<br>
* --><br>
</div>
<em class="html"></script></em><br>
</div>
<em class="html"></div></em>
<br>
<em class="html"><div <em class="html4">id="obsoletetypes"</em>></em><br>
<div class="indent">
<em class="html"><p></em>This Web browser executes scripts with these valid, obsolete content types:<em class="html"></p></em><br>
<br>
<em class="html"><script <strong class="tested">type="text/javascript"</strong>></em><!--<br>
<div class="indent">
// Historically misused for JavaScript<br>
// Registered as obsolete in 2005<br>
if (document.createTextNode) {<br>
<div class="indent">
// the standards-compliant DOM way<br>
var newPara = document.createElement("p");<br><br>
var textNode = document.createTextNode("\u2022 ");<br>
newPara.appendChild(textNode);<br><br>
var codeNode = document.createElement("code");<br>
newPara.appendChild(codeNode);<br><br>
textNode = document.createTextNode("text/javascript");<br>
codeNode.appendChild(textNode);<br><br>
var div = document.getElementById("obsoletetypes");<br>
div.appendChild(newPara);<br>
</div>
} else {<br>
<div class="indent">
// the old DHTML way<br>
document.writeln("<p><em class="html4"><em class="entity">&bull;</em></em> <code>text/javascript<\/code> <i>(without the <abbr>DOM<\/abbr>)<\/i><\/p>");<br>
</div>
}<br>
// --><br>
</div>
<em class="html"></script></em><br>
<em class="html"><script <strong class="tested">type="text/ecmascript"</strong>></em><!--<br>
<div class="indent">
// Poorly-chosen default for scripts in SVG<br>
// Registered as obsolete in 2005<br>
var newPara = document.createElement("p");<br><br>
var textNode = document.createTextNode("\u2022 ");<br>
newPara.appendChild(textNode);<br><br>
var codeNode = document.createElement("code");<br>
newPara.appendChild(codeNode);<br><br>
textNode = document.createTextNode("text/ecmascript");<br>
codeNode.appendChild(textNode);<br><br>
var div = document.getElementById("obsoletetypes");<br>
div.appendChild(newPara);<br>
// --><br>
</div>
<em class="html"></script></em><br>
<em class="html"><script <strong class="tested">type="application/x-javascript"</strong>></em><!--<br>
<div class="indent">
// Widely-accepted unregistered type for JavaScript<br>
// Used since the days of Netscape 3.x<br>
if (document.createTextNode) {<br>
<div class="indent">
// the standards-compliant DOM way<br>
var newPara = document.createElement("p");<br><br>
var textNode = document.createTextNode("\u2022 ");<br>
newPara.appendChild(textNode);<br><br>
var codeNode = document.createElement("code");<br>
newPara.appendChild(codeNode);<br><br>
textNode = document.createTextNode("application/x-javascript");<br>
codeNode.appendChild(textNode);<br><br>
var div = document.getElementById("obsoletetypes");<br>
div.appendChild(newPara);<br>
</div>
} else {<br>
<div class="indent">
// the old DHTML way<br>
document.writeln("<p><em class="html4"><em class="entity">&bull;</em></em> <code>application/x-javascript<\/code> <i>(without the <abbr>DOM<\/abbr>)<\/i><\/p>");<br>
</div>
}<br>
// --><br>
</div>
<em class="html"></script></em><br>
<em class="html"><script <strong class="tested">type="application/x-ecmascript"</strong>></em><!--<br>
<div class="indent">
// Recommended by ECMAScript standard<br>
// To be replaced by application/ecmascript<br>
var newPara = document.createElement("p");<br><br>
var textNode = document.createTextNode("\u2022 ");<br>
newPara.appendChild(textNode);<br><br>
var codeNode = document.createElement("code");<br>
newPara.appendChild(codeNode);<br><br>
textNode = document.createTextNode("application/x-ecmascript");<br>
codeNode.appendChild(textNode);<br><br>
var div = document.getElementById("obsoletetypes");<br>
div.appendChild(newPara);<br>
// --><br>
</div>
<em class="html"></script></em><br>
</div>
<em class="html"></div></em>
<br>
<em class="html"><div <em class="html4">id="invalidtypes"</em>></em><br>
<div class="indent">
<em class="html"><p></em>This Web browser executes scripts with these unregistered content types:<em class="html"></p></em><br>
<br>
<em class="html"><script <strong class="tested">type="text/fakescript"</strong>></em><!--<br>
<div class="indent">
alert("I should not be running a text/fakescript script!");<br>
document.writeln('<p><em class="html4"><em class="entity">&bull;</em></em> <em>text/fakescript<\/em><\/p>');<br>
// --><br>
</div>
<em class="html"></script></em><br>
<em class="html"><script <strong class="tested">type="text/jscript"</strong>></em><!--<br>
<div class="indent">
// Microsoft's proprietary version<br>
if (document.createTextNode) {<br>
<div class="indent">
// the standards-compliant DOM way<br>
var newPara = document.createElement("p");<br><br>
var textNode = document.createTextNode("\u2022 ");<br>
newPara.appendChild(textNode);<br><br>
var codeNode = document.createElement("code");<br>
newPara.appendChild(codeNode);<br><br>
textNode = document.createTextNode("text/jscript");<br>
codeNode.appendChild(textNode);<br><br>
var div = document.getElementById("invalidtypes");<br>
div.appendChild(newPara);<br>
</div>
} else {<br>
<div class="indent">
// the old DHTML way<br>
document.writeln("<p><em class="html4"><em class="entity">&bull;</em></em> <code>text/jscript<\/code> <i>(without the <abbr>DOM<\/abbr>)<\/i><\/p>");<br>
</div>
}<br>
// --><br>
</div>
<em class="html"></script></em><br>
<em class="html"><script <strong class="tested">type="text/livescript"</strong>></em><!--<br>
<div class="indent">
// iCab's alias<br>
if (document.createTextNode) {<br>
<div class="indent">
// the standards-compliant DOM way<br>
var newPara = document.createElement("p");<br><br>
var textNode = document.createTextNode("\u2022 ");<br>
newPara.appendChild(textNode);<br><br>
var codeNode = document.createElement("code");<br>
newPara.appendChild(codeNode);<br><br>
textNode = document.createTextNode("text/livescript");<br>
codeNode.appendChild(textNode);<br><br>
var div = document.getElementById("invalidtypes");<br>
div.appendChild(newPara);<br>
</div>
} else {<br>
<div class="indent">
// the old DHTML way<br>
document.writeln("<p><em class="html4"><em class="entity">&bull;</em></em> <code>text/livescript<\/code> <i>(without the <abbr>DOM<\/abbr>)<\/i><\/p>");<br>
</div>
}<br>
// --><br>
</div>
<em class="html"></script></em><br>
<em class="html"><script <strong class="tested">type="text/vbscript"</strong>></em><!--<br>
<div class="indent">
option explicit<br>
dim newPara, textNode, codeNode, div<br><br>
set newPara = document.createElement("p")<br>
set textNode = document.createTextNode(ChrW(&H2022) + " ")<br>
newPara.appendChild(textNode)<br><br>
set codeNode = document.createElement("code")<br>
newPara.appendChild(codeNode)<br><br>
set textNode = document.createTextNode("text/vbscript")<br>
codeNode.appendChild(textNode)<br><br>
set div = document.getElementById("invalidtypes")<br>
div.appendChild(newPara)<br>
' --><br>
</div>
<em class="html"></script></em><br>
<em class="html"><script <strong class="tested">type="text/vbs"</strong>></em><!--<br>
<div class="indent">
option explicit<br>
dim newPara, textNode, codeNode, div<br><br>
set newPara = document.createElement("p")<br>
set textNode = document.createTextNode(ChrW(&H2022) + " ")<br>
newPara.appendChild(textNode)<br><br>
set codeNode = document.createElement("code")<br>
newPara.appendChild(codeNode)<br><br>
set textNode = document.createTextNode("text/vbs")<br>
codeNode.appendChild(textNode)<br><br>
set div = document.getElementById("invalidtypes")<br>
div.appendChild(newPara)<br>
' --><br>
</div>
<em class="html"></script></em><br>
<em class="html"><script <strong class="tested">type="text/tcl"</strong>></em><!--<br>
<div class="indent">
# I know of no Web browsers that run Tcl.<br>
# The standard mentions text/tcl as an example value<br>
# for the Content-Script-Type header.<br>
document writeln "<p><em class="html4"><em class="entity">&bull;</em></em> <i><code>text/tcl<\/code><\/i><\/p>"<br>
# --><br>
</div>
<em class="html"></script></em><br>
</div>
<em class="html"></div></em>
</div>
<h4 class="resultheader">Your Web browser renders it like this:</h4>
<div class="results" id="result2">
<div id="validtypes">
<p>This Web browser executes scripts with these valid content types:</p>
<script type="application/javascript"><!--
// Correct but rarely supported type for JavaScript
if (document.createTextNode) {
// the standards-compliant DOM way
var newPara = document.createElement("p");
var textNode = document.createTextNode("\u2022 ");
newPara.appendChild(textNode);
var codeNode = document.createElement("code");
newPara.appendChild(codeNode);
textNode = document.createTextNode("application/javascript");
codeNode.appendChild(textNode);
var div = document.getElementById("validtypes");
div.appendChild(newPara);
} else {
// the old DHTML way
document.writeln("<p>• <code>application/javascript<\/code> <i>(without the <abbr>DOM<\/abbr>)<\/i><\/p>");
}
// -->
</script>
<script type="application/ecmascript"><!--
// Correct but rarely supported type for ECMA script
// Proposed by ECMAScript standard
var newPara = document.createElement("p");
var textNode = document.createTextNode("\u2022 ");
newPara.appendChild(textNode);
var codeNode = document.createElement("code");
newPara.appendChild(codeNode);
textNode = document.createTextNode("application/ecmascript");
codeNode.appendChild(textNode);
var div = document.getElementById("validtypes");
div.appendChild(newPara);
// -->
</script>
<script type="application/x-tcl"><!--
# The correct type for Tcl.<br>
# I know of no Web browsers that run Tcl.<br>
document write "<p>• <code>text/tcl<\/code><\/p>"
# -->
</script>
<script type="application/x-vbscript"><!--
' The correct type for VBScript
document.writeln "<p>• <code>text/vbscript<", "/code><", "/p>"
' -->
</script>
<script type="application/x-perlscript"><!--
# The correct type for PerlScript
# I know of no Web browsers that run PerlScript,
# but some Web servers can generate page content with it.
$window->document->writeln("<p>• <code>application/x-perlscript<\/code><\/p>");
# -->
</script>
<script type="application/x-cobolscript"><!--
* You youngsters are so spoiled.
* Back in the day, we wrote Web pages on punched cards...
IDENTIFICATION DIVISION.
PROGRAM-ID. Test_COBOLScript.
DATA DIVISION.
WORKING-STORAGE DIVISION.
PROCEDURE DIVISION.
INVOKE HOST "document.write" USING BY VALUE "<p>• <code>application/x-cobolscript<".
INVOKE HOST "document.write" USING BY VALUE "/code><".
INVOKE HOST "document.write" USING BY VALUE "/p>"
END PROGRAM.
* -->
</script>
</div>
<div id="obsoletetypes">
<p>This Web browser executes scripts with these valid, obsolete content types:</p>
<script type="text/javascript"><!--
// Historically misused for JavaScript
// Registered as obsolete in 2005
if (document.createTextNode) {
// the standards-compliant DOM way
var newPara = document.createElement("p");
var textNode = document.createTextNode("\u2022 ");
newPara.appendChild(textNode);
var codeNode = document.createElement("code");
newPara.appendChild(codeNode);
textNode = document.createTextNode("text/javascript");
codeNode.appendChild(textNode);
var div = document.getElementById("obsoletetypes");
div.appendChild(newPara);
} else {
// the old DHTML way
document.writeln("<p>• <code>text/javascript<\/code> <i>(without the <abbr>DOM<\/abbr>)<\/i><\/p>");
}
// -->
</script>
<script type="text/ecmascript"><!--
// Poorly-chosen default for scripts in SVG
// Registered as obsolete in 2005
var newPara = document.createElement("p");
var textNode = document.createTextNode("\u2022 ");
newPara.appendChild(textNode);
var codeNode = document.createElement("code");
newPara.appendChild(codeNode);
textNode = document.createTextNode("text/ecmascript");
codeNode.appendChild(textNode);
var div = document.getElementById("obsoletetypes");
div.appendChild(newPara);
// -->
</script>
<script type="application/x-javascript"><!--
// Widely-accepted unregistered type for JavaScript
// Used since the days of Netscape 3.x
if (document.createTextNode) {
// the standards-compliant DOM way
var newPara = document.createElement("p");
var textNode = document.createTextNode("\u2022 ");
newPara.appendChild(textNode);
var codeNode = document.createElement("code");
newPara.appendChild(codeNode);
textNode = document.createTextNode("application/x-javascript");
codeNode.appendChild(textNode);
var div = document.getElementById("obsoletetypes");
div.appendChild(newPara);
} else {
// the old DHTML way
document.writeln("<p>• <code>application/x-javascript<\/code> <i>(without the <abbr>DOM<\/abbr>)<\/i><\/p>");
}
// -->
</script>
<script type="application/x-ecmascript"><!--
// Recommended by ECMAScript standard
// To be replaced by application/ecmascript
var newPara = document.createElement("p");
var textNode = document.createTextNode("\u2022 ");
newPara.appendChild(textNode);
var codeNode = document.createElement("code");
newPara.appendChild(codeNode);
textNode = document.createTextNode("application/x-ecmascript");
codeNode.appendChild(textNode);
var div = document.getElementById("obsoletetypes");
div.appendChild(newPara);
// -->
</script>
</div>
<div id="invalidtypes">
<p>This Web browser executes scripts with these unregistered content types:</p>
<script type="text/fakescript"><!--
alert("I should not be running a text/fakescript script!");
document.writeln("<p>• <em>text/fakescript<\/em><\/p>");
// -->
</script>
<script type="text/jscript"><!--
// MicroSoft's proprietary version
if (document.createTextNode) {
// the standards-compliant DOM way
var newPara = document.createElement("p");
var textNode = document.createTextNode("\u2022 ");
newPara.appendChild(textNode);
var codeNode = document.createElement("code");
newPara.appendChild(codeNode);
textNode = document.createTextNode("text/jscript");
codeNode.appendChild(textNode);
var div = document.getElementById("invalidtypes");
div.appendChild(newPara);
} else {
// the old DHTML way
document.writeln("<p>• <code>text/jscript<\/code> <i>(without the <abbr>DOM<\/abbr>)<\/i><\/p>");
}
// -->
</script>
<script type="text/livescript"><!--
// iCab's alias
if (document.createTextNode) {
// the standards-compliant DOM way
var newPara = document.createElement("p");
var textNode = document.createTextNode("\u2022 ");
newPara.appendChild(textNode);
var codeNode = document.createElement("code");
newPara.appendChild(codeNode);
textNode = document.createTextNode("text/livescript");
codeNode.appendChild(textNode);
var div = document.getElementById("invalidtypes");
div.appendChild(newPara);
} else {
// the old DHTML way
document.writeln("<p>• <code>text/livescript<\/code> <i>(without the <abbr>DOM<\/abbr>)<\/i><\/p>");
}
// -->
</script>
<script type="text/vbscript"><!--
option explicit
dim newPara, textNode, codeNode, div
set newPara = document.createElement("p")
set textNode = document.createTextNode(ChrW(&H2022) + " ")
newPara.appendChild(textNode)
set codeNode = document.createElement("code")
newPara.appendChild(codeNode)
set textNode = document.createTextNode("text/vbscript")
codeNode.appendChild(textNode)
set div = document.getElementById("invalidtypes")
div.appendChild(newPara)
' -->
</script>
<script type="text/vbs"><!--
option explicit
dim newPara, textNode, codeNode, div
set newPara = document.createElement("p")
set textNode = document.createTextNode(ChrW(&H2022) + " ")
newPara.appendChild(textNode)
set codeNode = document.createElement("code")
newPara.appendChild(codeNode)
set textNode = document.createTextNode("text/vbs")
codeNode.appendChild(textNode)
set div = document.getElementById("invalidtypes")
div.appendChild(newPara)
' -->
</script>
<script type="text/tcl"><!--
# I know of no Web browsers that run Tcl.<br>
# The standard mentions text/tcl as an example value<br>
# for the Content-Script-Type header.<br>
document write "<p>• <code>text/tcl<\/code><\/p>"
# -->
</script>
</div>
</div>
<p class="note bugzilla">Related <em class="browser">Mozilla</em> bug reports: <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=text-ecmascript">text-ecmascript</a>.</p>
</div>
</div>
<div class="section" id="defer">
<h2>Deferring execution</h2>
<div class="bodytext">
<p>The <a class="specsect" href="http://www.w3.org/TR/html4/interact/scripts.html#adef-defer" title="HTML 4.0 Specification: 18 Scripts"><code class="attribute">defer</code></a> attribute marks scripts that may be executed after the rest of a page has finished rendering. It is used for scripts that do not generate document content (using methods like <code>document.writeln()</code> functions in the scripts above).</p>
<p class="note">Deferring <code>document.writeln()</code> functions until a page is fully loaded would cause generated content to be appended to the end of the page. However, one could defer a script that used <a href="glossary#dom" rel="glossary"><abbr title="Document Object Model">DOM</abbr></a> methods to insert content within a particular element in a document.</p>
</div>
<div class="illo">
<h3>Example:</h3>
<div class="blockcode">
<em class="html"><script <em class="html4">type="text/javascript"</em>></em><!--<br>
<div class="indent">
var defer_support = "used";<br>
// --><br>
</div>
<em class="html"></script></em><br>
<em class="html"><script <em class="html4">type="text/javascript"</em> <strong class="tested">defer</strong>></em><!--<br>
<div class="indent">
// may be executed after the following script<br>
var defer_support = "ignored";<br>
// --><br>
</div>
<em class="html"></script></em><br>
<em class="html"><script <em class="html4">type="text/javascript"</em>></em><!--<br>
<div class="indent">
document.writeln("<p>The <code>defer<\/code> attribute was ", defer_support, ".<\/p>");<br>
// --><br>
</div>
<em class="html"></script></em><br>
</div>
<h4 class="resultheader">Your Web browser renders it like this:</h4>
<div class="results" id="result3">
<script type="text/javascript"><!--
var defer_support = "used";
// -->
</script>
<script type="text/javascript" defer><!--
// may be executed after the following script
defer_support = "ignored";
// -->
</script>
<script type="text/javascript"><!--
document.writeln("<p>The <code>defer<\/code> attribute was ", defer_support, ".<\/p>");
// -->
</script>
</div>
<p class="note bugzilla">Related <em class="browser">Mozilla</em> bug reports: <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=Defer">Defer</a>.</p>
<p class="note msie">Related <em class="browser">Internet Explorer</em> bug reports: <a href="http://channel9.msdn.com/wiki/default.aspx/Channel9.InternetExplorerStandardsSupport">Channel9 Wiki: Internet Explorer Standards Support</a>.</p>
</div>
</div>
<div id="browserver">
<h2>Your Browser</h2>
<p>Your Web browser identified itself as <strong><code id="useragent">Wget/1.11.4</code></strong> when it requested this page.</p>
<script type="text/javascript" src="browserid.js"></script>
<noscript><p>Your Web browser did not run a script to reveal how it identifies itself to scripts.</p></noscript>
</div>
<div id="footer">
<div id="buttons">
<a href="http://www.mozilla.com/firefox/" title="Mozilla Firefox"><object type="image/png" width="80" height="15" id="firefox_button" data="/images/buttons/firefox.png">Get Firefox</object></a>
<a href="http://my.opera.com/rlionheart/affiliate/" title="Opera"><object type="image/png" width="80" height="15" id="opera_button" data="/images/buttons/opera.png">Get Opera</object></a>
<a rel="license" href="http://creativecommons.org/licenses/by-sa/2.5/" title="Creative Commons Deed"><object type="image/png" width="80" height="15" id="cc_button" data="/images/buttons/cc.png">Some rights reserved.</object></a>
<a href="http://www.htmlhelp.com/cgi-bin/validate.cgi?url=referer" title="WDG HTML Validation Service"><object type="image/png" width="80" height="15" id="html401_button" data="/images/buttons/html401.png">Valid HTML 4.01</object></a>
<a href="http://jigsaw.w3.org/css-validator/check/referer" title="W3C CSS Validation Service"><object type="image/png" width="80" height="15" id="css_button" data="/images/buttons/css.png">Valid CSS</object></a>
</div>
<p><a rel="copyright" href="/copyright" class="local">©</a> 1998 <span class="vcard"><a rel="home" href="/" class="local fn">Robin Lionheart</a> (<a rev="made" href="mailto:lionheart@robinlionheart.com" class="email local">lionheart@robin­lionheart.com</a>) [<a href="/robin/pubkey" class="local">public key</a>]</span></p>
<div id="dehanced">
<p>Best read with a browser that supports <abbr title="Extensible Hypertext Markup Language">XHTML</abbr>, <abbr title="Cascading Style Sheets level 2">CSS 2</abbr>, and <abbr title="Portable Network Graphics">PNG</abbr> images. I recommend <a href="http://www.mozilla.org/products/firefox/">Firefox</a>.</p>
<p>Degraded to fit your browser (JavaScript MIME type).</p>
</div> </div>
|
