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    <p>Dunno why "am not i am" delete his/her answer, it is mostly correct. The <a href="http://www.w3.org/TR/DOM-Level-2-HTML/html.html#ID-63239895" rel="nofollow">form</a> <strong>property</strong> is specified in the DOM 2 HTML spec as readonly and references the form that a form control is in. If it isn't in a form, it will be undefined.</p> <p>The form <a href="http://dev.w3.org/html5/spec/single-page.html#attr-fae-form" rel="nofollow"><strong>attribute</strong></a> is new in HTML5 and is intended to associate a control with a form other than the one it is in. This is intended to be used for nested forms.</p> <p>Setting a form attribute on an input element may have unpredictable results. In browsers conforming to HTML5, if the value of the form attribute is the ID of another form in the document, the control will be associated with that form so its form property is a reference to the form and its form attribute will be a string (the ID of the associated form). Otherwise, the attribute value will not be reflected in the control's form DOM property but may keep the attribute value as set.</p> <p>IE has always messed up attributes and properties, IE 6 replaces the form property with the attribute value regardless. Maybe later versions behave differently, perhaps one of them supports HTML5.</p> <p>The following may help:</p> <pre><code>&lt;form id="form0"&gt; &lt;div&gt; &lt;input type="button" form="form1" onclick= "alert('form property is: ' + this.form + ' ' + this.form.id + '\nform attribute: ' + (typeof this.getAttribute('form')) + ' ' + this.getAttribute('form')) " value="Show form property and attribute"&gt; &lt;/div&gt; &lt;/form&gt; &lt;form id="form1"&gt;&lt;div&gt;&lt;/div&gt;&lt;/form&gt; </code></pre>
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    1. POhow to set form attribute on a createElement input with Javascript
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    1. COWas there anything incorrect about my question? I was asking about the form attribute... A form-associated element is, by default, associated with its nearest ancestor form element, but may have a form attribute specified to override this.
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    2. COI was just pointing out the difference between the form attribute and property, something that confounds many web developers (including those developing IE). The form attribute (as a standard attribute) is new, so browser support varies and so will results. You don't state what you expect setting it to do, so hard to say why it isn't doing what you want. Dunno who gave the question a -1.
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    3. COOh, and IE 8 is like IE 6, setting a form attribute sets the form property to same string value whether or not it's the ID of a form.
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