Oggetto di opzione del HTML DOM

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Oggetto di opzione del HTML DOM

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Oggetto di opzione

L'oggetto di opzione rappresenta un'opzione in un elenco a discesa in una forma del HTML.

Per ogni caso di una modifica del <option> in una forma del HTML, un oggetto di opzione � generato automaticamente.

Potete accedere ad un oggetto di opzione cercando con l'allineamento degli elementi [] della forma o usando document.getElementById ().

IE: Internet Explorer, O: Opera, F: Firefox, W3C: Consorzio di World Wide Web (campione del Internet)

Propriet� dell'oggetto di opzione

Property	Description	IE	F	O	W3C
defaultSelected	Returns the default value of the selected attribute	4	1	9	Yes
disabled	Sets or returns whether or not an option should be disabled	4	1	9	Yes
form	Returns a reference to the form that contains an option	4	1	9	Yes
id	Sets or returns the id of an option	4	1	9	Yes
index	Returns the index position of an option in a dropdown list	4	1	9	Yes
label	Sets or returns a label for an option (only for option-groups)	6			Yes
selected	Sets or returns the value of the selected attribute	4	1	9	Yes
text	Sets or returns the text value of an option	4	1	9	Yes
value	Sets or returns the value to be sent to the server	4	1	9	Yes

Propriet� standard

Property	Description	IE	F	O	W3C
className	Sets or returns the class attribute of an element	5	1	9	Yes
dir	Sets or returns the direction of text	5	1	9	Yes
lang	Sets or returns the language code for an element	5	1	9	Yes
title	Sets or returns an element's advisory title	5	1	9	Yes

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Keywords: html document, html element, html content, text node

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