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A radio button or option button [citation needed] is a graphical control element that allows the user to choose only one of a predefined set of mutually exclusive options. [1] The singular property of a radio button makes it distinct from checkboxes , where the user can select and unselect any number of items.
<radio> — a radio button <file> — a file select control for uploading a file <reset> — a reset button that, when activated, tells the browser to restore the values of the current form, to their initial values. <submit> — a button that tells the browser to take action on the form (typically to send it to a server)
Using the history of a page, it is possible to generate a diff between any two versions – select the left radio button for the older version, the right radio button for the newer version, and click Compare selected revisions. While editing a page, the Show changes button displays the changes you
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The Markup Validation Service is a validator by the World Wide Web Consortium (W3C) that allows Internet users to check pre-HTML5 HTML and XHTML documents for well-formed markup against a document type definition (DTD). Markup validation is an important step towards ensuring the technical quality of web pages.
In EAV systems representing classes with substructure, the validation metadata will also record what class, if any, a given attribute belongs to. Presentation metadata: how the attribute is to be displayed to the user (e.g., as a text box or image of specified dimensions, a pull-down list or a set of radio buttons). When a compound object is ...
The fuwUpdateOptions() function will enable or disable the submit button in response to this validation. (Possible alternative: keep the submit button always enabled and run validateInput() only when it's clicked, showing a warning message if false.
A graphical user interface (GUI) showing various elements: radio buttons, checkboxes, and other elements. A graphical user interface, or GUI [a], is a form of user interface that allows users to interact with electronic devices through graphical icons and visual indicators such as secondary notation.