Annotation of html5/spec/the-form-element.html, revision 1.13
1.1 mike 1: <!DOCTYPE html>
2: <html lang="en-US-x-Hixie"><head><title>4.10.3 The form element — HTML5</title><style type="text/css">
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166: body.dfnEnabled dfn { cursor: pointer; }
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173: padding: 0.5em 0.75em;
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175: background: #DDDDDD;
176: color: black;
177: border: outset 0.2em;
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183: .dfnPanel li { list-style-position: inside; }
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186: #configUI p { margin: 0.5em 0; padding: 0.3em; background: #EEEEEE; color: black; border: inset thin; }
187: #configUI p label { display: block; }
188: #configUI #updateUI, #configUI .loginUI { text-align: center; }
189: #configUI input[type=button] { display: block; margin: auto; }
190:
191: fieldset { margin: 1em; padding: 0.5em 1em; }
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195:
196: </style><link href="http://www.w3.org/StyleSheets/TR/W3C-ED" rel="stylesheet" type="text/css"><style type="text/css">
197:
198: .applies thead th > * { display: block; }
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201: .applies td { text-align: center; }
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205: .matrix { margin-left: 2em; }
206:
207: .dice-example { border-collapse: collapse; border-style: hidden solid solid hidden; border-width: thin; margin-left: 3em; }
208: .dice-example caption { width: 30em; font-size: smaller; font-style: italic; padding: 0.75em 0; text-align: left; }
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210:
211: td.eg { border-width: thin; text-align: center; }
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217: #table-example-1 th, #table-example-1 td { border: solid thin; }
218: #table-example-1 th { font-weight: normal; }
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229:
230: .apple-table-examples { border: none; border-collapse: separate; border-spacing: 1.5em 0em; width: 40em; margin-left: 3em; }
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242:
243: .details-example img { vertical-align: top; }
244:
245: #base64-table {
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254: -webkit-column-width: 6em;
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262:
263: #named-character-references-table {
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272: }
273: #named-character-references-table > table > tbody > tr > td:first-child + td,
274: #named-character-references-table > table > tbody > tr > td:last-child { text-align: center; }
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277:
278: .glyph.control { color: red; }
279:
280: @font-face {
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282: src: url('http://www.whatwg.org/specs/web-apps/current-work/fonts/Essays1743.ttf');
283: }
284: @font-face {
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299: }
300:
301: </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 type="text/javascript">
302: function getCookie(name) {
303: var params = location.search.substr(1).split("&");
304: for (var index = 0; index < params.length; index++) {
305: if (params[index] == name)
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308: if (data[0] == name)
309: return unescape(data[1]);
310: }
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314: if (data[0] == name)
315: return unescape(data[1]);
316: }
317: return null;
318: }
319: </script>
320: <script src="link-fixup.js"></script>
321: <link href="forms.html" title="4.10 Forms" rel="prev">
322: <link href="index.html#contents" title="Table of contents" rel="contents">
323: <link href="the-fieldset-element.html" title="4.10.4 The fieldset element" rel="next">
1.9 mike 324: </head><body onload="fixBrokenLink(); None" class="split chapter"><div class="head" id="head">
1.1 mike 325: <p><a href="http://www.w3.org/"><img alt="W3C" height="48" src="http://www.w3.org/Icons/w3c_home" width="72"></a></p>
326:
327: <h1>HTML5</h1>
1.13 ! mike 328: <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><p>This is revision 1.5482.</p>
1.1 mike 329:
1.12 mike 330: <h2 class="no-num no-toc" id="editor-s-draft-10-january-2012">Editor's Draft 10 January 2012</h2>
1.1 mike 331: </div><nav class="prev_next">
332: <a href="forms.html">← 4.10 Forms</a> –
333: <a href="index.html#contents">Table of contents</a> –
334: <a href="the-fieldset-element.html">4.10.4 The fieldset element →</a>
335: </nav>
336:
337: <h4 id="the-form-element"><span class="secno">4.10.3 </span>The <dfn><code>form</code></dfn> element</h4><dl class="element"><dt>Categories</dt>
338: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
339: <dd><a href="content-models.html#palpable-content">Palpable content</a>.</dd>
340: <dt>Contexts in which this element can be used:</dt>
341: <dd>Where <a href="content-models.html#flow-content">flow content</a> is expected.</dd>
342: <dt>Content model:</dt>
343: <dd><a href="content-models.html#flow-content">Flow content</a>, but with no <code><a href="#the-form-element">form</a></code> element descendants.</dd>
344: <dt>Content attributes:</dt>
345: <dd><a href="global-attributes.html#global-attributes">Global attributes</a></dd>
346: <dd><code title="attr-form-accept-charset"><a href="#attr-form-accept-charset">accept-charset</a></code></dd>
347: <dd><code title="attr-fs-action"><a href="attributes-common-to-form-controls.html#attr-fs-action">action</a></code></dd>
348: <dd><code title="attr-form-autocomplete"><a href="#attr-form-autocomplete">autocomplete</a></code></dd>
349: <dd><code title="attr-fs-enctype"><a href="attributes-common-to-form-controls.html#attr-fs-enctype">enctype</a></code></dd>
350: <dd><code title="attr-fs-method"><a href="attributes-common-to-form-controls.html#attr-fs-method">method</a></code></dd>
351: <dd><code title="attr-form-name"><a href="#attr-form-name">name</a></code></dd>
352: <dd><code title="attr-fs-novalidate"><a href="attributes-common-to-form-controls.html#attr-fs-novalidate">novalidate</a></code></dd>
353: <dd><code title="attr-fs-target"><a href="attributes-common-to-form-controls.html#attr-fs-target">target</a></code></dd>
354: <dt>DOM interface:</dt>
355: <dd>
356: <pre class="idl">[OverrideBuiltins]
357: interface <dfn id="htmlformelement">HTMLFormElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
358: attribute DOMString <a href="#dom-form-acceptcharset" title="dom-form-acceptCharset">acceptCharset</a>;
359: attribute DOMString <a href="attributes-common-to-form-controls.html#dom-fs-action" title="dom-fs-action">action</a>;
360: attribute DOMString <a href="#dom-form-autocomplete" title="dom-form-autocomplete">autocomplete</a>;
361: attribute DOMString <a href="attributes-common-to-form-controls.html#dom-fs-enctype" title="dom-fs-enctype">enctype</a>;
362: attribute DOMString <a href="attributes-common-to-form-controls.html#dom-fs-encoding" title="dom-fs-encoding">encoding</a>;
363: attribute DOMString <a href="attributes-common-to-form-controls.html#dom-fs-method" title="dom-fs-method">method</a>;
364: attribute DOMString <a href="#dom-form-name" title="dom-form-name">name</a>;
365: attribute boolean <a href="attributes-common-to-form-controls.html#dom-fs-novalidate" title="dom-fs-noValidate">noValidate</a>;
366: attribute DOMString <a href="attributes-common-to-form-controls.html#dom-fs-target" title="dom-fs-target">target</a>;
367:
368: readonly attribute <a href="common-dom-interfaces.html#htmlformcontrolscollection">HTMLFormControlsCollection</a> <a href="#dom-form-elements" title="dom-form-elements">elements</a>;
369: readonly attribute long <a href="#dom-form-length" title="dom-form-length">length</a>;
370: <a href="#dom-form-item" title="dom-form-item">getter</a> <a href="infrastructure.html#element">Element</a> (unsigned long index);
371: <a href="#dom-form-nameditem" title="dom-form-namedItem">getter</a> object (DOMString name);
372:
373: void <a href="#dom-form-submit" title="dom-form-submit">submit</a>();
374: void <a href="#dom-form-reset" title="dom-form-reset">reset</a>();
375: boolean <a href="#dom-form-checkvalidity" title="dom-form-checkValidity">checkValidity</a>();
376: };</pre>
377: </dd>
378: </dl><p>The <code><a href="#the-form-element">form</a></code> element <a href="rendering.html#represents">represents</a> a
379: collection of <a href="forms.html#form-associated-element" title="form-associated element">form-associated
380: elements</a>, some of which can represent editable values that
381: can be submitted to a server for processing.</p><p>The <dfn id="attr-form-accept-charset" title="attr-form-accept-charset"><code>accept-charset</code></dfn>
382: attribute gives the character encodings that are to be used for the
383: submission. If specified, the value must be an <a href="common-microsyntaxes.html#ordered-set-of-unique-space-separated-tokens">ordered set of
384: unique space-separated tokens</a> that are <a href="infrastructure.html#ascii-case-insensitive">ASCII
385: case-insensitive</a>, and each token must be an <a href="infrastructure.html#ascii-case-insensitive">ASCII
386: case-insensitive</a> match for the <a href="infrastructure.html#preferred-mime-name">preferred MIME
387: name</a> of an <a href="infrastructure.html#ascii-compatible-character-encoding">ASCII-compatible character encoding</a>.
388: <a href="references.html#refsIANACHARSET">[IANACHARSET]</a></p><p>The <dfn id="attr-form-name" title="attr-form-name"><code>name</code></dfn> attribute
389: 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
390: not be the empty string, and the value must be unique amongst the
391: <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
392: any.</p><p>The <dfn id="attr-form-autocomplete" title="attr-form-autocomplete"><code>autocomplete</code></dfn>
393: attribute is an <a href="common-microsyntaxes.html#enumerated-attribute">enumerated attribute</a>. The attribute has
394: two states. The <code title="attr-form-autocomplete-on">on</code>
395: keyword maps to the <dfn id="attr-form-autocomplete-on-state" title="attr-form-autocomplete-on-state">on</dfn> state, and the
396: <code title="attr-form-autocomplete-off">off</code> keyword maps to
397: the <dfn id="attr-form-autocomplete-off-state" title="attr-form-autocomplete-off-state">off</dfn>
398: state. The attribute may also be omitted. The <i>missing value
399: 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
400: that by default, <code><a href="the-input-element.html#the-input-element">input</a></code> elements in the form will have
401: 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
402: that by default, <code><a href="the-input-element.html#the-input-element">input</a></code> elements in the form will have
403: their <a href="common-input-element-attributes.html#resulting-autocompletion-state">resulting autocompletion state</a> set to <i title="">on</i>.</p><p>The <code title="attr-fs-action"><a href="attributes-common-to-form-controls.html#attr-fs-action">action</a></code>, <code title="attr-fs-enctype"><a href="attributes-common-to-form-controls.html#attr-fs-enctype">enctype</a></code>, <code title="attr-fs-method"><a href="attributes-common-to-form-controls.html#attr-fs-method">method</a></code>, <code title="attr-fs-novalidate"><a href="attributes-common-to-form-controls.html#attr-fs-novalidate">novalidate</a></code>, and <code title="attr-fs-target"><a href="attributes-common-to-form-controls.html#attr-fs-target">target</a></code> attributes are <a href="attributes-common-to-form-controls.html#attributes-for-form-submission">attributes
404: for form submission</a>.</p><dl class="domintro"><dt><var title="">form</var> . <code title="dom-form-elements"><a href="#dom-form-elements">elements</a></code></dt>
405:
406: <dd>
407:
408: <p>Returns an <code><a href="infrastructure.html#htmlcollection">HTMLCollection</a></code> of the form controls in
409: the form (excluding image buttons for historical reasons).</p>
410:
411: </dd>
412:
413: <dt><var title="">form</var> . <code title="dom-form-length"><a href="#dom-form-length">length</a></code></dt>
414:
415: <dd>
416:
417: <p>Returns the number of form controls in the form (excluding
418: image buttons for historical reasons).</p>
419:
420: </dd>
421:
422: <dt><var title="">form</var>[<var title="">index</var>]</dt>
423: <dt><var title="">form</var>(<var title="">index</var>)</dt>
424:
425: <dd>
426:
427: <p>Returns the <var title="">index</var>th element in the form
428: (excluding image buttons for historical reasons).</p>
429:
430: </dd>
431:
432: <dt><var title="">form</var>[<var title="">name</var>]</dt>
433: <dt><var title="">form</var>(<var title="">name</var>)</dt>
434:
435: <dd>
436:
437: <p>Returns the form control (or, if there are several, a
438: <code><a href="infrastructure.html#nodelist">NodeList</a></code> of the form controls) in the form with the
439: 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
440: historical reasons); or, if there are none, returns the
441: <code><a href="the-img-element.html#the-img-element">img</a></code> element with the given ID.</p>
442:
443: <p>Once an element has been referenced using a particular name,
444: that name will continue being available as a way to reference that
445: 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
446: element remains in the <code><a href="dom.html#document">Document</a></code>.</p>
447:
448: <p>If there are multiple matching items, then a
449: <code><a href="infrastructure.html#nodelist">NodeList</a></code> object containing all those elements is
450: returned.</p>
451:
452: </dd>
453:
454: <dt><var title="">form</var> . <code title="dom-form-submit"><a href="#dom-form-submit">submit</a></code>()</dt>
455:
456: <dd>
457:
458: <p>Submits the form.</p>
459:
460: </dd>
461:
462: <dt><var title="">form</var> . <code title="dom-form-reset"><a href="#dom-form-reset">reset</a></code>()</dt>
463:
464: <dd>
465:
466: <p>Resets the form.</p>
467:
468: </dd>
469:
470: <dt><var title="">form</var> . <code title="dom-form-checkValidity"><a href="#dom-form-checkvalidity">checkValidity</a></code>()</dt>
471:
472: <dd>
473:
474: <p>Returns true if the form's controls are all valid; otherwise,
475: returns false.</p>
476:
477: </dd>
478:
479: </dl><div class="impl">
480:
481: <p>The <dfn id="dom-form-autocomplete" title="dom-form-autocomplete"><code>autocomplete</code></dfn> IDL
482: attribute must <a href="common-dom-interfaces.html#reflect">reflect</a> the content attribute of the
483: same name, <a href="common-dom-interfaces.html#limited-to-only-known-values">limited to only known values</a>.</p>
484:
485: <p>The <dfn id="dom-form-name" title="dom-form-name"><code>name</code></dfn> IDL
486: attribute must <a href="common-dom-interfaces.html#reflect">reflect</a> the content attribute of the
487: same name.</p>
488:
489: <p>The <dfn id="dom-form-acceptcharset" title="dom-form-acceptCharset"><code>acceptCharset</code></dfn> IDL
490: 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
491: attribute.</p>
492:
493: <hr><p>The <dfn id="dom-form-elements" title="dom-form-elements"><code>elements</code></dfn>
494: IDL attribute must return an <code><a href="common-dom-interfaces.html#htmlformcontrolscollection">HTMLFormControlsCollection</a></code>
495: rooted at the <code><a href="dom.html#document">Document</a></code> node, whose filter matches <a href="forms.html#category-listed" title="category-listed">listed elements</a> whose <a href="association-of-controls-and-forms.html#form-owner">form
496: owner</a> is the <code><a href="#the-form-element">form</a></code> element, with the exception of
1.8 mike 497: <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 498: for historical reasons, be excluded from this particular
499: collection.</p>
500:
501: <p>The <dfn id="dom-form-length" title="dom-form-length"><code>length</code></dfn> IDL
502: attribute must return the number of nodes <a href="infrastructure.html#represented-by-the-collection" title="represented
503: by the collection">represented</a> by the <code title="dom-form-elements"><a href="#dom-form-elements">elements</a></code> collection.</p>
504:
505: <p>The <a href="infrastructure.html#supported-property-indices">supported property indices</a> at any instant are
506: 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
507: instant.</p>
508:
509: <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>,
510: the user agent must return the value returned by the <code title="dom-HTMLFormControlsCollection-item">item</code> method on
511: the <code title="dom-form-elements"><a href="#dom-form-elements">elements</a></code> collection, when
512: invoked with the given index as its argument.</p>
513:
514: <hr><p>Each <code><a href="#the-form-element">form</a></code> element has a mapping of names to elements
515: called the <dfn id="past-names-map">past names map</dfn>. It is used to persist names of
516: controls even when they change names.</p>
517:
518: <p>The <a href="infrastructure.html#supported-property-names">supported property names</a> consist of the values
519: 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>
520: elements that are descendants of the <code><a href="#the-form-element">form</a></code> element, and
521: all the names currently in the <a href="#past-names-map">past names map</a>.</p>
522:
523: <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
524: retrieval</dfn>, the user agent must run the following steps:</p>
525:
526: <ol><li><p>Let <var title="">candidates</var> be a <a href="infrastructure.html#live">live</a>
527: <code><a href="infrastructure.html#nodelist">NodeList</a></code> object containing all the <a href="forms.html#category-listed" title="category-listed">listed elements</a> that are descendants
528: 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>
529:
530: <li><p>If <var title="">candidates</var> is empty, let <var title="">candidates</var> be a <a href="infrastructure.html#live">live</a>
531: <code><a href="infrastructure.html#nodelist">NodeList</a></code> object containing all the <code><a href="the-img-element.html#the-img-element">img</a></code>
532: elements that are descendants of the <code><a href="#the-form-element">form</a></code> element and
533: that have either an <code title="attr-id"><a href="global-attributes.html#the-id-attribute">id</a></code> attribute or a
534: <code title="attr-img-name"><a href="obsolete.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>
535:
536: <li><p>If <var title="">candidates</var> is empty, <var title="">name</var> is the name of one of the entries in the
537: <code><a href="#the-form-element">form</a></code> element's <a href="#past-names-map">past names map</a>: return the
538: object associated with <var title="">name</var> in that
539: map.</p></li>
540:
541: <li><p>If <var title="">candidates</var> contains more than one
542: node, return <var title="">candidates</var> and abort these
543: steps.</p></li>
544:
545: <li><p>Otherwise, <var title="">candidates</var> contains exactly
546: one node. Add a mapping from <var title="">name</var> to the node
547: in <var title="">candidates</var> in the <code><a href="#the-form-element">form</a></code> element's
548: <a href="#past-names-map">past names map</a>, replacing the previous entry with the
549: same name, if any.</p></li>
550:
551: <li><p>Return the node in <var title="">candidates</var>.</p></li>
552:
553: </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
554: names map</a> is removed from the <code><a href="dom.html#document">Document</a></code>, then its
555: entries must be removed from the map.</p>
556:
557:
1.4 mike 558:
1.1 mike 559:
560:
561: <hr><p>The <dfn id="dom-form-submit" title="dom-form-submit"><code>submit()</code></dfn>
562: method, when invoked, must <a href="form-submission.html#concept-form-submit" title="concept-form-submit">submit</a> the <code><a href="#the-form-element">form</a></code>
563: 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>
564:
565: <p>The <dfn id="dom-form-reset" title="dom-form-reset"><code>reset()</code></dfn>
566: method, when invoked, must run the following steps:</p>
567:
568: <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
569: reset</a></i>, then abort these steps.</p></li>
570:
571: <li><p>Mark the <code><a href="#the-form-element">form</a></code> element as <dfn id="locked-for-reset">locked for
572: reset</dfn>.</p></li>
573:
574: <li><p><a href="form-submission.html#concept-form-reset" title="concept-form-reset">Reset</a> the
575: <code><a href="#the-form-element">form</a></code> element.</p></li>
576:
577: <li><p>Unmark the <code><a href="#the-form-element">form</a></code> element as <i><a href="#locked-for-reset">locked for
578: reset</a></i>.</p></li>
579:
580: </ol><p>If the <dfn id="dom-form-checkvalidity" title="dom-form-checkValidity"><code>checkValidity()</code></dfn>
581: method is invoked, the user agent must <a href="constraints.html#statically-validate-the-constraints">statically validate the
582: constraints</a> of the <code><a href="#the-form-element">form</a></code> element, and return true
583: if the constraint validation return a <i>positive</i> result, and
584: false if it returned a <i>negative</i> result.</p>
585:
586: </div><div class="example">
587:
588: <p>This example shows two search forms:</p>
589:
590: <pre><form action="http://www.google.com/search" method="get">
591: <label>Google: <input type="search" name="q"></label> <input type="submit" value="Search...">
592: </form>
593: <form action="http://www.bing.com/search" method="get">
594: <label>Bing: <input type="search" name="q"></label> <input type="submit" value="Search...">
595: </form></pre>
596:
597: </div></body></html>
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