Annotation of html5/spec/the-form-element.html, revision 1.190
1.88 mike 1: <!DOCTYPE html>
1.159 sruby 2: <html lang="en-US-x-Hixie"><head><title>4.10.3 The form element — HTML5</title><style type="text/css">
1.1 mike 3: pre { margin-left: 2em; white-space: pre-wrap; }
4: h2 { margin: 3em 0 1em 0; }
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24: pre strong { color: black; font: inherit; font-weight: bold; background: yellow; }
25: pre em { font-weight: bolder; font-style: normal; }
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31: table tbody th { text-align: left; }
32: table td, table th { border-left: solid; border-right: solid; border-bottom: solid thin; vertical-align: top; padding: 0.2em; }
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34:
35: .bad, .bad *:not(.XXX) { color: gray; border-color: gray; background: transparent; }
36: .matrix, .matrix td { border: none; text-align: right; }
37: .matrix { margin-left: 2em; }
38: .dice-example { border-collapse: collapse; border-style: hidden solid solid hidden; border-width: thin; margin-left: 3em; }
39: .dice-example caption { width: 30em; font-size: smaller; font-style: italic; padding: 0.75em 0; text-align: left; }
40: .dice-example td, .dice-example th { border: solid thin; width: 1.35em; height: 1.05em; text-align: center; padding: 0; }
41:
42: .toc dfn, h1 dfn, h2 dfn, h3 dfn, h4 dfn, h5 dfn, h6 dfn { font: inherit; }
43: img.extra, p.overview { float: right; }
44: pre.idl { border: solid thin; background: #EEEEEE; color: black; padding: 0.5em 1em; position: relative; }
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50: hr + dl.domintro, div.impl + dl.domintro { margin-top: 2.5em; margin-bottom: 1.5em; }
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52: dl.domintro dd { margin: 0.5em 0 1em 2em; padding: 0; }
53: dl.domintro dd p { margin: 0.5em 0; }
54: dl.domintro:before { display: table; margin: -1em -0.5em -0.5em auto; width: auto; content: 'This box is non-normative. Implementation requirements are given below this box.'; color: black; font-style: italic; border: solid 2px; background: white; padding: 0 0.25em; }
55: dl.switch { padding-left: 2em; }
56: dl.switch > dt { text-indent: -1.5em; }
57: dl.switch > dt:before { content: '\21AA'; padding: 0 0.5em 0 0; display: inline-block; width: 1em; text-align: right; line-height: 0.5em; }
58: dl.triple { padding: 0 0 0 1em; }
59: dl.triple dt, dl.triple dd { margin: 0; display: inline }
60: dl.triple dt:after { content: ':'; }
61: dl.triple dd:after { content: '\A'; white-space: pre; }
62: .diff-old { text-decoration: line-through; color: silver; background: transparent; }
63: .diff-chg, .diff-new { text-decoration: underline; color: green; background: transparent; }
64: a .diff-new { border-bottom: 1px blue solid; }
65:
1.180 sruby 66: figure.diagrams { border: double black; background: white; padding: 1em; }
67: figure.diagrams img { display: block; margin: 1em auto; }
68:
1.1 mike 69: h2 { page-break-before: always; }
70: h1, h2, h3, h4, h5, h6 { page-break-after: avoid; }
71: h1 + h2, hr + h2.no-toc { page-break-before: auto; }
72:
73: p > span:not([title=""]):not([class="XXX"]):not([class="impl"]):not([class="note"]),
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75:
76: div.head { margin: 0 0 1em; padding: 1em 0 0 0; }
77: div.head p { margin: 0; }
78: div.head h1 { margin: 0; }
79: div.head .logo { float: right; margin: 0 1em; }
80: div.head .logo img { border: none } /* remove border from top image */
81: div.head dl { margin: 1em 0; }
82: div.head p.copyright, div.head p.alt { font-size: x-small; font-style: oblique; margin: 0; }
83:
84: body > .toc > li { margin-top: 1em; margin-bottom: 1em; }
85: body > .toc.brief > li { margin-top: 0.35em; margin-bottom: 0.35em; }
86: body > .toc > li > * { margin-bottom: 0.5em; }
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88: .toc, .toc li { list-style: none; }
89:
90: .brief { margin-top: 1em; margin-bottom: 1em; line-height: 1.1; }
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92: .brief li p { margin: 0; padding: 0; }
93:
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97: .category-list li:not(:last-child)::after { content: ', '; }
98: .category-list li > span, .category-list li > a { text-transform: lowercase; }
99: .category-list li * { text-transform: none; } /* don't affect <code> nested in <a> */
100:
101: .XXX { color: #E50000; background: white; border: solid red; padding: 0.5em; margin: 1em 0; }
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126:
127: h4 { position: relative; z-index: 3; }
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150: }
151:
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153: td > .example:only-child { margin: 0 0 0 0.1em; }
154:
155: ul.domTree, ul.domTree ul { padding: 0 0 0 1em; margin: 0; }
156: ul.domTree li { padding: 0; margin: 0; list-style: none; position: relative; }
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166: ul.domTree .t7 code, .domTree .t8 code { color: green; }
167: ul.domTree .t10 code { color: teal; }
168:
169: body.dfnEnabled dfn { cursor: pointer; }
170: .dfnPanel {
171: display: inline;
172: position: absolute;
173: z-index: 10;
174: height: auto;
175: width: auto;
176: padding: 0.5em 0.75em;
177: font: small sans-serif, Droid Sans Fallback;
178: background: #DDDDDD;
179: color: black;
180: border: outset 0.2em;
181: }
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184: .dfnPanel p { font-weight: bolder; }
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186: .dfnPanel li { list-style-position: inside; }
187:
188: #configUI { position: absolute; z-index: 20; top: 10em; right: 1em; width: 11em; font-size: small; }
189: #configUI p { margin: 0.5em 0; padding: 0.3em; background: #EEEEEE; color: black; border: inset thin; }
190: #configUI p label { display: block; }
191: #configUI #updateUI, #configUI .loginUI { text-align: center; }
192: #configUI input[type=button] { display: block; margin: auto; }
193:
194: fieldset { margin: 1em; padding: 0.5em 1em; }
195: fieldset > legend + * { margin-top: 0; }
196: fieldset > :last-child { margin-bottom: 0; }
197: fieldset p { margin: 0.5em 0; }
198:
1.159 sruby 199: </style><link href="http://www.w3.org/StyleSheets/TR/W3C-ED" rel="stylesheet" type="text/css"><style type="text/css">
1.1 mike 200:
201: .applies thead th > * { display: block; }
202: .applies thead code { display: block; }
203: .applies tbody th { whitespace: nowrap; }
204: .applies td { text-align: center; }
205: .applies .yes { background: yellow; }
206:
207: .matrix, .matrix td { border: hidden; text-align: right; }
208: .matrix { margin-left: 2em; }
209:
210: .dice-example { border-collapse: collapse; border-style: hidden solid solid hidden; border-width: thin; margin-left: 3em; }
211: .dice-example caption { width: 30em; font-size: smaller; font-style: italic; padding: 0.75em 0; text-align: left; }
212: .dice-example td, .dice-example th { border: solid thin; width: 1.35em; height: 1.05em; text-align: center; padding: 0; }
213:
214: td.eg { border-width: thin; text-align: center; }
215:
216: #table-example-1 { border: solid thin; border-collapse: collapse; margin-left: 3em; }
217: #table-example-1 * { font-family: "Essays1743", serif; line-height: 1.01em; }
218: #table-example-1 caption { padding-bottom: 0.5em; }
219: #table-example-1 thead, #table-example-1 tbody { border: none; }
220: #table-example-1 th, #table-example-1 td { border: solid thin; }
221: #table-example-1 th { font-weight: normal; }
222: #table-example-1 td { border-style: none solid; vertical-align: top; }
223: #table-example-1 th { padding: 0.5em; vertical-align: middle; text-align: center; }
224: #table-example-1 tbody tr:first-child td { padding-top: 0.5em; }
225: #table-example-1 tbody tr:last-child td { padding-bottom: 1.5em; }
226: #table-example-1 tbody td:first-child { padding-left: 2.5em; padding-right: 0; width: 9em; }
227: #table-example-1 tbody td:first-child::after { content: leader(". "); }
228: #table-example-1 tbody td { padding-left: 2em; padding-right: 2em; }
229: #table-example-1 tbody td:first-child + td { width: 10em; }
230: #table-example-1 tbody td:first-child + td ~ td { width: 2.5em; }
231: #table-example-1 tbody td:first-child + td + td + td ~ td { width: 1.25em; }
232:
233: .apple-table-examples { border: none; border-collapse: separate; border-spacing: 1.5em 0em; width: 40em; margin-left: 3em; }
234: .apple-table-examples * { font-family: "Times", serif; }
235: .apple-table-examples td, .apple-table-examples th { border: none; white-space: nowrap; padding-top: 0; padding-bottom: 0; }
236: .apple-table-examples tbody th:first-child { border-left: none; width: 100%; }
237: .apple-table-examples thead th:first-child ~ th { font-size: smaller; font-weight: bolder; border-bottom: solid 2px; text-align: center; }
238: .apple-table-examples tbody th::after, .apple-table-examples tfoot th::after { content: leader(". ") }
239: .apple-table-examples tbody th, .apple-table-examples tfoot th { font: inherit; text-align: left; }
240: .apple-table-examples td { text-align: right; vertical-align: top; }
241: .apple-table-examples.e1 tbody tr:last-child td { border-bottom: solid 1px; }
242: .apple-table-examples.e1 tbody + tbody tr:last-child td { border-bottom: double 3px; }
243: .apple-table-examples.e2 th[scope=row] { padding-left: 1em; }
244: .apple-table-examples sup { line-height: 0; }
245:
246: .details-example img { vertical-align: top; }
247:
248: #base64-table {
249: white-space: nowrap;
250: font-size: 0.6em;
251: column-width: 6em;
252: column-count: 5;
253: column-gap: 1em;
254: -moz-column-width: 6em;
255: -moz-column-count: 5;
256: -moz-column-gap: 1em;
257: -webkit-column-width: 6em;
258: -webkit-column-count: 5;
259: -webkit-column-gap: 1em;
260: }
261: #base64-table thead { display: none; }
262: #base64-table * { border: none; }
263: #base64-table tbody td:first-child:after { content: ':'; }
264: #base64-table tbody td:last-child { text-align: right; }
265:
266: #named-character-references-table {
267: white-space: nowrap;
268: font-size: 0.6em;
269: column-width: 30em;
270: column-gap: 1em;
271: -moz-column-width: 30em;
272: -moz-column-gap: 1em;
273: -webkit-column-width: 30em;
274: -webkit-column-gap: 1em;
275: }
276: #named-character-references-table > table > tbody > tr > td:first-child + td,
277: #named-character-references-table > table > tbody > tr > td:last-child { text-align: center; }
278: #named-character-references-table > table > tbody > tr > td:last-child:hover > span { position: absolute; top: auto; left: auto; margin-left: 0.5em; line-height: 1.2; font-size: 5em; border: outset; padding: 0.25em 0.5em; background: white; width: 1.25em; height: auto; text-align: center; }
279: #named-character-references-table > table > tbody > tr#entity-CounterClockwiseContourIntegral > td:first-child { font-size: 0.5em; }
280:
281: .glyph.control { color: red; }
282:
283: @font-face {
284: font-family: 'Essays1743';
1.178 sruby 285: src: url('../fonts/Essays1743.ttf');
1.1 mike 286: }
287: @font-face {
288: font-family: 'Essays1743';
289: font-weight: bold;
1.178 sruby 290: src: url('../fonts/Essays1743-Bold.ttf');
1.1 mike 291: }
292: @font-face {
293: font-family: 'Essays1743';
294: font-style: italic;
1.178 sruby 295: src: url('../fonts/Essays1743-Italic.ttf');
1.1 mike 296: }
297: @font-face {
298: font-family: 'Essays1743';
299: font-style: italic;
300: font-weight: bold;
1.178 sruby 301: src: url('../fonts/Essays1743-BoldItalic.ttf');
1.1 mike 302: }
303:
1.159 sruby 304: </style><link href="data:text/css," id="complete" rel="stylesheet" title="Complete specification"><link href="data:text/css,.impl%20%7B%20display:%20none;%20%7D%0Ahtml%20%7B%20border:%20solid%20yellow;%20%7D%20.domintro:before%20%7B%20display:%20none;%20%7D" id="author" rel="alternate stylesheet" title="Author documentation only"><link href="data:text/css,.impl%20%7B%20background:%20%23FFEEEE;%20%7D%20.domintro:before%20%7B%20background:%20%23FFEEEE;%20%7D" id="highlight" rel="alternate stylesheet" title="Highlight implementation requirements"><script>
1.1 mike 305: function getCookie(name) {
306: var params = location.search.substr(1).split("&");
307: for (var index = 0; index < params.length; index++) {
308: if (params[index] == name)
309: return "1";
310: var data = params[index].split("=");
311: if (data[0] == name)
312: return unescape(data[1]);
313: }
314: var cookies = document.cookie.split("; ");
315: for (var index = 0; index < cookies.length; index++) {
316: var data = cookies[index].split("=");
317: if (data[0] == name)
318: return unescape(data[1]);
319: }
320: return null;
321: }
1.190 ! sruby 322: </script><link href="forms.html" title="4.10 Forms" rel="prev">
! 323: <link href="spec.html#contents" title="Table of contents" rel="contents">
1.1 mike 324: <link href="the-fieldset-element.html" title="4.10.4 The fieldset element" rel="next">
1.22 mike 325: </head><body onload="fixBrokenLink();" class="split chapter"><div class="head" id="head">
1.1 mike 326: <p><a href="http://www.w3.org/"><img alt="W3C" height="48" src="http://www.w3.org/Icons/w3c_home" width="72"></a></p>
327:
328: <h1>HTML5</h1>
1.190 ! sruby 329: <h2 class="no-num no-toc" id="a-vocabulary-and-associated-apis-for-html-and-xhtml">A vocabulary and associated APIs for HTML and XHTML</h2>
! 330: <h2 class="no-num no-toc" id="editor's-draft-date-1-january-1970">Editor's Draft 6 October 2012</h2>
1.85 mike 331: </div>
1.190 ! sruby 332: <div class="prev_next">
1.1 mike 333: <a href="forms.html">← 4.10 Forms</a> –
1.190 ! sruby 334: <a href="spec.html#contents">Table of contents</a> –
1.1 mike 335: <a href="the-fieldset-element.html">4.10.4 The fieldset element →</a>
1.190 ! sruby 336: </div>
1.1 mike 337:
1.85 mike 338: <h4 id="the-form-element"><span class="secno">4.10.3 </span>The <dfn><code>form</code></dfn> element</h4>
339:
340: <dl class="element"><dt><a href="element-definitions.html#element-dfn-categories" title="element-dfn-categories">Categories</a>:</dt>
1.159 sruby 341: <dd><a href="content-models.html#flow-content-1">Flow content</a>.</dd>
342: <dd><a href="content-models.html#palpable-content-0">Palpable content</a>.</dd>
1.25 mike 343: <dt><a href="element-definitions.html#element-dfn-contexts" title="element-dfn-contexts">Contexts in which this element can be used</a>:</dt>
1.159 sruby 344: <dd>Where <a href="content-models.html#flow-content-1">flow content</a> is expected.</dd>
1.25 mike 345: <dt><a href="element-definitions.html#element-dfn-content-model" title="element-dfn-content-model">Content model</a>:</dt>
1.159 sruby 346: <dd><a href="content-models.html#flow-content-1">Flow content</a>, but with no <code><a href="#the-form-element">form</a></code> element descendants.</dd>
1.25 mike 347: <dt><a href="element-definitions.html#element-dfn-attributes" title="element-dfn-attributes">Content attributes</a>:</dt>
1.1 mike 348: <dd><a href="global-attributes.html#global-attributes">Global attributes</a></dd>
349: <dd><code title="attr-form-accept-charset"><a href="#attr-form-accept-charset">accept-charset</a></code></dd>
1.159 sruby 350: <dd><code title="attr-fs-action"><a href="form-submission.html#attr-fs-action">action</a></code></dd>
1.1 mike 351: <dd><code title="attr-form-autocomplete"><a href="#attr-form-autocomplete">autocomplete</a></code></dd>
1.159 sruby 352: <dd><code title="attr-fs-enctype"><a href="form-submission.html#attr-fs-enctype">enctype</a></code></dd>
353: <dd><code title="attr-fs-method"><a href="form-submission.html#attr-fs-method">method</a></code></dd>
1.1 mike 354: <dd><code title="attr-form-name"><a href="#attr-form-name">name</a></code></dd>
1.159 sruby 355: <dd><code title="attr-fs-novalidate"><a href="form-submission.html#attr-fs-novalidate">novalidate</a></code></dd>
356: <dd><code title="attr-fs-target"><a href="form-submission.html#attr-fs-target">target</a></code></dd>
357: <dt><a href="element-definitions.html#element-dfn-dom" title="element-dfn-dom">DOM interface</a>:</dt><!--TOPIC:DOM APIs-->
1.1 mike 358: <dd>
359: <pre class="idl">[OverrideBuiltins]
360: interface <dfn id="htmlformelement">HTMLFormElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
361: attribute DOMString <a href="#dom-form-acceptcharset" title="dom-form-acceptCharset">acceptCharset</a>;
1.159 sruby 362: attribute DOMString <a href="form-submission.html#dom-fs-action" title="dom-fs-action">action</a>;
1.1 mike 363: attribute DOMString <a href="#dom-form-autocomplete" title="dom-form-autocomplete">autocomplete</a>;
1.159 sruby 364: attribute DOMString <a href="form-submission.html#dom-fs-enctype" title="dom-fs-enctype">enctype</a>;
365: attribute DOMString <a href="form-submission.html#dom-fs-encoding" title="dom-fs-encoding">encoding</a>;<!-- historical artefact -->
366: attribute DOMString <a href="form-submission.html#dom-fs-method" title="dom-fs-method">method</a>;
1.1 mike 367: attribute DOMString <a href="#dom-form-name" title="dom-form-name">name</a>;
1.159 sruby 368: attribute boolean <a href="form-submission.html#dom-fs-novalidate" title="dom-fs-noValidate">noValidate</a>;
369: attribute DOMString <a href="form-submission.html#dom-fs-target" title="dom-fs-target">target</a>;
1.1 mike 370:
1.159 sruby 371: readonly attribute <a href="common-dom-interfaces.html#htmlformcontrolscollection-0">HTMLFormControlsCollection</a> <a href="#dom-form-elements" title="dom-form-elements">elements</a>;
1.1 mike 372: readonly attribute long <a href="#dom-form-length" title="dom-form-length">length</a>;
373: <a href="#dom-form-item" title="dom-form-item">getter</a> <a href="infrastructure.html#element">Element</a> (unsigned long index);
374: <a href="#dom-form-nameditem" title="dom-form-namedItem">getter</a> object (DOMString name);
375:
376: void <a href="#dom-form-submit" title="dom-form-submit">submit</a>();
377: void <a href="#dom-form-reset" title="dom-form-reset">reset</a>();
378: boolean <a href="#dom-form-checkvalidity" title="dom-form-checkValidity">checkValidity</a>();
379: };</pre>
380: </dd>
1.190 ! sruby 381: </dl><!--TOPIC:HTML--><p>The <code><a href="#the-form-element">form</a></code> element <a href="textFieldSelection.html#represents">represents</a> a
1.1 mike 382: collection of <a href="forms.html#form-associated-element" title="form-associated element">form-associated
383: elements</a>, some of which can represent editable values that
1.85 mike 384: can be submitted to a server for processing.</p>
385:
386: <p>The <dfn id="attr-form-accept-charset" title="attr-form-accept-charset"><code>accept-charset</code></dfn>
1.1 mike 387: attribute gives the character encodings that are to be used for the
388: submission. If specified, the value must be an <a href="common-microsyntaxes.html#ordered-set-of-unique-space-separated-tokens">ordered set of
389: unique space-separated tokens</a> that are <a href="infrastructure.html#ascii-case-insensitive">ASCII
390: case-insensitive</a>, and each token must be an <a href="infrastructure.html#ascii-case-insensitive">ASCII
391: case-insensitive</a> match for the <a href="infrastructure.html#preferred-mime-name">preferred MIME
392: name</a> of an <a href="infrastructure.html#ascii-compatible-character-encoding">ASCII-compatible character encoding</a>.
1.190 ! sruby 393: <a href="textFieldSelection.html#refsIANACHARSET">[IANACHARSET]</a></p>
1.85 mike 394:
395: <p>The <dfn id="attr-form-name" title="attr-form-name"><code>name</code></dfn> attribute
1.1 mike 396: represents the <code><a href="#the-form-element">form</a></code>'s name within the <code title="dom-document-forms"><a href="dom.html#dom-document-forms">forms</a></code> collection. The value must
397: not be the empty string, and the value must be unique amongst the
398: <code><a href="#the-form-element">form</a></code> elements in the <code title="dom-document-forms"><a href="dom.html#dom-document-forms">forms</a></code> collection that it is in, if
1.85 mike 399: any.</p>
400:
401: <p>The <dfn id="attr-form-autocomplete" title="attr-form-autocomplete"><code>autocomplete</code></dfn>
1.1 mike 402: attribute is an <a href="common-microsyntaxes.html#enumerated-attribute">enumerated attribute</a>. The attribute has
403: two states. The <code title="attr-form-autocomplete-on">on</code>
404: keyword maps to the <dfn id="attr-form-autocomplete-on-state" title="attr-form-autocomplete-on-state">on</dfn> state, and the
405: <code title="attr-form-autocomplete-off">off</code> keyword maps to
406: the <dfn id="attr-form-autocomplete-off-state" title="attr-form-autocomplete-off-state">off</dfn>
407: state. The attribute may also be omitted. The <i>missing value
408: default</i> is the <a href="#attr-form-autocomplete-on-state" title="attr-form-autocomplete-on-state">on</a> state. The <a href="#attr-form-autocomplete-off-state" title="attr-form-autocomplete-off-state">off</a> state indicates
409: that by default, <code><a href="the-input-element.html#the-input-element">input</a></code> elements in the form will have
410: their <a href="common-input-element-attributes.html#resulting-autocompletion-state">resulting autocompletion state</a> set to <i title="">off</i>; the <a href="#attr-form-autocomplete-on-state" title="attr-form-autocomplete-on-state">on</a> state indicates
411: that by default, <code><a href="the-input-element.html#the-input-element">input</a></code> elements in the form will have
1.85 mike 412: their <a href="common-input-element-attributes.html#resulting-autocompletion-state">resulting autocompletion state</a> set to <i title="">on</i>.</p>
413:
1.159 sruby 414: <p>The <code title="attr-fs-action"><a href="form-submission.html#attr-fs-action">action</a></code>, <code title="attr-fs-enctype"><a href="form-submission.html#attr-fs-enctype">enctype</a></code>, <code title="attr-fs-method"><a href="form-submission.html#attr-fs-method">method</a></code>, <code title="attr-fs-novalidate"><a href="form-submission.html#attr-fs-novalidate">novalidate</a></code>, and <code title="attr-fs-target"><a href="form-submission.html#attr-fs-target">target</a></code> attributes are <a href="form-submission.html#attributes-for-form-submission">attributes
1.85 mike 415: for form submission</a>.</p>
416:
1.159 sruby 417: <!--TOPIC:DOM APIs-->
1.85 mike 418: <dl class="domintro"><dt><var title="">form</var> . <code title="dom-form-elements"><a href="#dom-form-elements">elements</a></code></dt>
1.1 mike 419:
420: <dd>
421:
422: <p>Returns an <code><a href="infrastructure.html#htmlcollection">HTMLCollection</a></code> of the form controls in
423: the form (excluding image buttons for historical reasons).</p>
424:
425: </dd>
426:
427: <dt><var title="">form</var> . <code title="dom-form-length"><a href="#dom-form-length">length</a></code></dt>
428:
429: <dd>
430:
431: <p>Returns the number of form controls in the form (excluding
432: image buttons for historical reasons).</p>
433:
434: </dd>
435:
436: <dt><var title="">form</var>[<var title="">index</var>]</dt>
437: <dt><var title="">form</var>(<var title="">index</var>)</dt>
438:
439: <dd>
440:
441: <p>Returns the <var title="">index</var>th element in the form
442: (excluding image buttons for historical reasons).</p>
443:
444: </dd>
445:
446: <dt><var title="">form</var>[<var title="">name</var>]</dt>
447: <dt><var title="">form</var>(<var title="">name</var>)</dt>
448:
449: <dd>
450:
451: <p>Returns the form control (or, if there are several, a
1.123 mike 452: <code><a href="common-dom-interfaces.html#radionodelist">RadioNodeList</a></code> of the form controls) in the form with
453: the given <a href="infrastructure.html#concept-id" title="concept-id">ID</a> or <code title="attr-fe-name"><a href="attributes-common-to-form-controls.html#attr-fe-name">name</a></code> (excluding image buttons for
1.1 mike 454: historical reasons); or, if there are none, returns the
455: <code><a href="the-img-element.html#the-img-element">img</a></code> element with the given ID.</p>
456:
457: <p>Once an element has been referenced using a particular name,
458: that name will continue being available as a way to reference that
459: element in this method, even if the element's actual <a href="infrastructure.html#concept-id" title="concept-id">ID</a> or <code title="attr-fe-name"><a href="attributes-common-to-form-controls.html#attr-fe-name">name</a></code> changes, for as long as the
460: element remains in the <code><a href="dom.html#document">Document</a></code>.</p>
461:
462: <p>If there are multiple matching items, then a
1.123 mike 463: <code><a href="common-dom-interfaces.html#radionodelist">RadioNodeList</a></code> object containing all those elements is
1.1 mike 464: returned.</p>
465:
466: </dd>
467:
468: <dt><var title="">form</var> . <code title="dom-form-submit"><a href="#dom-form-submit">submit</a></code>()</dt>
469:
470: <dd>
471:
472: <p>Submits the form.</p>
473:
474: </dd>
475:
476: <dt><var title="">form</var> . <code title="dom-form-reset"><a href="#dom-form-reset">reset</a></code>()</dt>
477:
478: <dd>
479:
480: <p>Resets the form.</p>
481:
482: </dd>
483:
484: <dt><var title="">form</var> . <code title="dom-form-checkValidity"><a href="#dom-form-checkvalidity">checkValidity</a></code>()</dt>
485:
486: <dd>
487:
488: <p>Returns true if the form's controls are all valid; otherwise,
489: returns false.</p>
490:
491: </dd>
492:
493: </dl><div class="impl">
494:
495: <p>The <dfn id="dom-form-autocomplete" title="dom-form-autocomplete"><code>autocomplete</code></dfn> IDL
496: attribute must <a href="common-dom-interfaces.html#reflect">reflect</a> the content attribute of the
497: same name, <a href="common-dom-interfaces.html#limited-to-only-known-values">limited to only known values</a>.</p>
498:
499: <p>The <dfn id="dom-form-name" title="dom-form-name"><code>name</code></dfn> IDL
500: attribute must <a href="common-dom-interfaces.html#reflect">reflect</a> the content attribute of the
501: same name.</p>
502:
503: <p>The <dfn id="dom-form-acceptcharset" title="dom-form-acceptCharset"><code>acceptCharset</code></dfn> IDL
504: attribute must <a href="common-dom-interfaces.html#reflect">reflect</a> the <code title="attr-form-accept-charset"><a href="#attr-form-accept-charset">accept-charset</a></code> content
505: attribute.</p>
506:
507: <hr><p>The <dfn id="dom-form-elements" title="dom-form-elements"><code>elements</code></dfn>
1.159 sruby 508: IDL attribute must return an <code><a href="common-dom-interfaces.html#htmlformcontrolscollection-0">HTMLFormControlsCollection</a></code>
1.124 mike 509: rooted at the <code><a href="dom.html#document">Document</a></code> node while the <code><a href="#the-form-element">form</a></code>
510: element is <a href="infrastructure.html#in-a-document">in a <code>Document</code></a> and rooted at the
511: <code><a href="#the-form-element">form</a></code> element itself when it is not, whose filter
512: matches <a href="forms.html#category-listed" title="category-listed">listed elements</a> whose
513: <a href="association-of-controls-and-forms.html#form-owner">form owner</a> is the <code><a href="#the-form-element">form</a></code> element, with the
1.159 sruby 514: exception of <code><a href="the-input-element.html#the-input-element">input</a></code> elements whose <code title="attr-input-type"><a href="the-input-element.html#attr-input-type">type</a></code> attribute is in the <a href="states-of-the-type-attribute.html#image-button-state-(type=image)" title="attr-input-type-image">Image Button</a> state, which must,
1.1 mike 515: for historical reasons, be excluded from this particular
516: collection.</p>
517:
518: <p>The <dfn id="dom-form-length" title="dom-form-length"><code>length</code></dfn> IDL
519: attribute must return the number of nodes <a href="infrastructure.html#represented-by-the-collection" title="represented
520: by the collection">represented</a> by the <code title="dom-form-elements"><a href="#dom-form-elements">elements</a></code> collection.</p>
521:
522: <p>The <a href="infrastructure.html#supported-property-indices">supported property indices</a> at any instant are
523: the indices supported by the object returned by the <code title="dom-form-elements"><a href="#dom-form-elements">elements</a></code> attribute at that
524: instant.</p>
525:
526: <p>When a <code><a href="#the-form-element">form</a></code> element is <dfn id="dom-form-item" title="dom-form-item">indexed for indexed property retrieval</dfn>,
527: the user agent must return the value returned by the <code title="dom-HTMLFormControlsCollection-item">item</code> method on
528: the <code title="dom-form-elements"><a href="#dom-form-elements">elements</a></code> collection, when
529: invoked with the given index as its argument.</p>
530:
1.159 sruby 531: <hr><!-- Welcome to crazy town. Population: The Web. --><p>Each <code><a href="#the-form-element">form</a></code> element has a mapping of names to elements
1.1 mike 532: called the <dfn id="past-names-map">past names map</dfn>. It is used to persist names of
533: controls even when they change names.</p>
534:
535: <p>The <a href="infrastructure.html#supported-property-names">supported property names</a> consist of the values
536: of all the <code title="attr-id"><a href="global-attributes.html#the-id-attribute">id</a></code> and <code title="attr-fe-name"><a href="attributes-common-to-form-controls.html#attr-fe-name">name</a></code> attributes of all the <a href="forms.html#category-listed" title="category-listed">listed elements</a> and <code><a href="the-img-element.html#the-img-element">img</a></code>
537: elements that are descendants of the <code><a href="#the-form-element">form</a></code> element, and
538: all the names currently in the <a href="#past-names-map">past names map</a>.</p>
539:
540: <p>When a <code><a href="#the-form-element">form</a></code> element is <dfn id="dom-form-nameditem" title="dom-form-namedItem">indexed for named property
541: retrieval</dfn>, the user agent must run the following steps:</p>
542:
543: <ol><li><p>Let <var title="">candidates</var> be a <a href="infrastructure.html#live">live</a>
1.123 mike 544: <code><a href="common-dom-interfaces.html#radionodelist">RadioNodeList</a></code> object containing all the <a href="forms.html#category-listed" title="category-listed">listed elements</a> that are descendants
1.1 mike 545: of the <code><a href="#the-form-element">form</a></code> element and that have either an <code title="attr-id"><a href="global-attributes.html#the-id-attribute">id</a></code> attribute or a <code title="attr-fe-name"><a href="attributes-common-to-form-controls.html#attr-fe-name">name</a></code> attribute equal to <var title="">name</var>, in <a href="infrastructure.html#tree-order">tree order</a>.</p></li>
546:
547: <li><p>If <var title="">candidates</var> is empty, let <var title="">candidates</var> be a <a href="infrastructure.html#live">live</a>
1.123 mike 548: <code><a href="common-dom-interfaces.html#radionodelist">RadioNodeList</a></code> object containing all the
549: <code><a href="the-img-element.html#the-img-element">img</a></code> elements that are descendants of the
1.190 ! sruby 550: <code><a href="#the-form-element">form</a></code> element and that have either an <code title="attr-id"><a href="global-attributes.html#the-id-attribute">id</a></code> attribute or a <code title="attr-img-name"><a href="textFieldSelection.html#attr-img-name">name</a></code> attribute equal to <var title="">name</var>, in <a href="infrastructure.html#tree-order">tree order</a>.</p></li>
1.1 mike 551:
552: <li><p>If <var title="">candidates</var> is empty, <var title="">name</var> is the name of one of the entries in the
553: <code><a href="#the-form-element">form</a></code> element's <a href="#past-names-map">past names map</a>: return the
554: object associated with <var title="">name</var> in that
555: map.</p></li>
556:
557: <li><p>If <var title="">candidates</var> contains more than one
558: node, return <var title="">candidates</var> and abort these
559: steps.</p></li>
560:
561: <li><p>Otherwise, <var title="">candidates</var> contains exactly
562: one node. Add a mapping from <var title="">name</var> to the node
563: in <var title="">candidates</var> in the <code><a href="#the-form-element">form</a></code> element's
564: <a href="#past-names-map">past names map</a>, replacing the previous entry with the
565: same name, if any.</p></li>
566:
567: <li><p>Return the node in <var title="">candidates</var>.</p></li>
568:
569: </ol><p>If an element listed in the <code><a href="#the-form-element">form</a></code> element's <a href="#past-names-map">past
570: names map</a> is removed from the <code><a href="dom.html#document">Document</a></code>, then its
571: entries must be removed from the map.</p>
572:
1.159 sruby 573: <!--
574: This ridiculous setup is intended to do as much of the right thing
575: while still supporting code written to work in IE7. IE versions
576: prior to IE8 do not update the names on the <form> element
577: collection to match new names when elements are renamed, and there
578: are enough pages that rename elements and then access them by
579: their old name that we have to support this.
580:
581: But we still want to expose them using the new names, so as far as
582: possible we pretend the legacy names aren't there except if
583: there's no other element actually named that way.
584:
585: Removing the element did remove the legacy name in IE7:
586: http://software.hixie.ch/utilities/js/live-dom-viewer/?%3C!DOCTYPE%20html%3E...%3Cform%20action%3D%22%2F%22%3E%3Cinput%20name%3Dsubmit%3E%3C%2Fform%3E%0A%3Cscript%3E%0A%20w(document.forms%5B0%5D.submit)%3B%0A%20w(document.forms%5B0%5D.removeChild(document.getElementsByTagName('input')%5B0%5D))%3B%0A%20w(document.forms%5B0%5D.length)%3B%0A%20try%20%7B%20document.forms%5B0%5D.submit()%3B%20%7D%20catch%20(e)%20%20%7B%20w(e.message)%20%7D%0A%3C%2Fscript%3E
587:
588: There's no interop on what happens when the name was originally a
589: duplicate name, so we don't persist such accesses - at the time
590: of writing, Safari returned the first element, Firefox returned
591: null (as we do), and IE7 returned the original collection:
592: http://software.hixie.ch/utilities/js/live-dom-viewer/?%3C!DOCTYPE%20html%3E...%3Cform%20action%3D%22%2F%22%3E%3Cinput%20name%3Da%20id%3Dfirst%3E%3Cinput%20name%3Da%20id%3Dsecond%3E%3C%2Fform%3E%0A%3Cscript%3E%0A%20w%28document.forms[0].a%29%3B%0A%20document.getElementsByTagName%28%27input%27%29[0].name%20%3D%20%27b%27%3B%0A%20document.getElementsByTagName%28%27input%27%29[1].name%20%3D%20%27b%27%3B%0A%20w%28document.forms[0].length%29%3B%0A%20w%28document.forms[0].a.id%29%3B%0A%3C%2Fscript%3E
593:
594: In addition, the <img> fallback nonsense is similarly here for
595: legacy reasons. As is the exclusion of <input type=image>.
1.4 mike 596:
1.159 sruby 597: Also, check this out:
598: http://software.hixie.ch/utilities/js/live-dom-viewer/saved/1220
599:
600: -->
601:
602: <!-- Now leaving crazy town. -->
1.1 mike 603:
604: <hr><p>The <dfn id="dom-form-submit" title="dom-form-submit"><code>submit()</code></dfn>
1.190 ! sruby 605: method, when invoked, must <a href="textFieldSelection.html#concept-form-submit" title="concept-form-submit">submit</a> the <code><a href="#the-form-element">form</a></code>
1.1 mike 606: element from the <code><a href="#the-form-element">form</a></code> element itself, with the <var title="">submitted from <code title="dom-form-submit"><a href="#dom-form-submit">submit()</a></code> method</var> flag set.</p>
607:
608: <p>The <dfn id="dom-form-reset" title="dom-form-reset"><code>reset()</code></dfn>
609: method, when invoked, must run the following steps:</p>
610:
611: <ol><li><p>If the <code><a href="#the-form-element">form</a></code> element is marked as <i><a href="#locked-for-reset">locked for
612: reset</a></i>, then abort these steps.</p></li>
613:
614: <li><p>Mark the <code><a href="#the-form-element">form</a></code> element as <dfn id="locked-for-reset">locked for
615: reset</dfn>.</p></li>
616:
1.190 ! sruby 617: <li><p><a href="textFieldSelection.html#concept-form-reset" title="concept-form-reset">Reset</a> the
1.1 mike 618: <code><a href="#the-form-element">form</a></code> element.</p></li>
619:
620: <li><p>Unmark the <code><a href="#the-form-element">form</a></code> element as <i><a href="#locked-for-reset">locked for
621: reset</a></i>.</p></li>
622:
623: </ol><p>If the <dfn id="dom-form-checkvalidity" title="dom-form-checkValidity"><code>checkValidity()</code></dfn>
1.190 ! sruby 624: method is invoked, the user agent must <a href="textFieldSelection.html#statically-validate-the-constraints">statically validate the
1.1 mike 625: constraints</a> of the <code><a href="#the-form-element">form</a></code> element, and return true
626: if the constraint validation return a <i>positive</i> result, and
627: false if it returned a <i>negative</i> result.</p>
628:
1.85 mike 629: </div>
1.159 sruby 630: <!--TOPIC:HTML-->
1.85 mike 631:
632: <div class="example">
1.1 mike 633:
634: <p>This example shows two search forms:</p>
635:
636: <pre><form action="http://www.google.com/search" method="get">
637: <label>Google: <input type="search" name="q"></label> <input type="submit" value="Search...">
638: </form>
639: <form action="http://www.bing.com/search" method="get">
640: <label>Bing: <input type="search" name="q"></label> <input type="submit" value="Search...">
641: </form></pre>
642:
1.85 mike 643: </div>
644:
645:
646:
647:
648: </body></html>
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