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A checkbox ( check box, tickbox, tick box) is a graphical widget that allows the user to make a binary choice, i.e. a choice between one of two possible mutually exclusive options. For example, the user may have to answer 'yes' (checked) or 'no' (not checked) on a simple yes/no question . Checkboxes are shown as empty boxes when unchecked, and ...
Radio buttons were named after the physical buttons used on older radios to select preset stations – when one of the buttons was pressed, other buttons would pop out, leaving the pressed button the only button in the "pushed in" position. HTML. In web forms, the HTML element < input type = "radio" > is used to display a radio button. Example:
A plain-language radio check is the means of requesting and giving a signal strength and readability report for radiotelephony (voice) communications, and is the direct equivalent to the QSA and QRK code used to give the same report in radiotelegraph ( Morse code) communications. SINPEMFO code is the voice signal reporting format developed by ...
An interesting aspect of radio buttons, when used in an HTML form, is that if no button in a group is checked, then no name-value pair is passed when the form is submitted. WRONG! W3C specs say user agents (browsers) should check the first element if none is marked checked; and that because not all user agents do that, authors should check a ...
Ext JS is a JavaScript application framework for building interactive cross-platform web applications [2] using techniques such as Ajax, DHTML and DOM scripting. It can be used as a simple component framework (for example, to create dynamic grids on otherwise static pages) but also as a full framework for building single-page applications (SPAs).
Input CheckboxStateChange Fires when a checkbox is checked or unchecked, either by the user or a script. No No RadioStateChange Fires when a radio button is selected, either by the user or a script. No No close onclose Fires when a request has been made to close the window. No Yes command oncommand Similar to W3C DOMActivate event.
HTML form. A webform, web form or HTML form on a web page allows a user to enter data that is sent to a server for processing. Forms can resemble paper or database forms because web users fill out the forms using checkboxes, radio buttons, or text fields. For example, forms can be used to enter shipping or credit card data to order a product ...
Amateur radio users in the U.S. and Canada have used the R-S-T system since 1934. This system was developed by amateur radio operator Arthur W. Braaten, W2BSR. It reports the readability on a scale of 1 to 5, the signal strength on a scale of 1 to 9, and the tone of the Morse code continuous wave signal on a scale of 1 to 9.