checked

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Summary

Sets or retrieves the state of the check box or radio button.

Applies to	?

Examples

View live exampleThis example retrieves the checked property to fire an event.

<head>
    <script>
    function checkthis()
    {
        if (oCheckbox.checked == true)
        {
            window.open("http://www.microsoft.com");
        }
    }
    </script>
</head>
<body>
    <p>Check here if you wish to go to Microsoft:
    <input id="oCheckbox" type="checkbox" onclick="checkthis()"></p>
</body>

Notes

Remarks

Check boxes that are not selected do not return their values when the form is submitted. A user can select a radio button only if the button has a name. To clear a selected radio button, a user must select another button in the set. Windows Internet Explorer 8 and later. In IE8 Standards mode, parsing operations on the checked content attribute always affect both the checked content attribute and defaultChecked Document Object Model (DOM) attribute. For example, removeAttribute('checked') sets both checked and defaultChecked to false. Similarly, setAttribute('checked', 'checked') sets both DOM attributes to true (as if the element was being re-parsed) For more information on IE8 mode, see Defining Document Compatibility. Internet Explorer 8 and later. In IE8 mode, the defaultChecked DOM attribute reflects the value of the checked content attribute.

Syntax

Standards information

Document Object Model (DOM) Level 1 Specification, Section 2.5.5
HTML 4.01 Specification, Section 17.4

Compatibility

Desktop

Feature	Chrome	Firefox (Gecko)	Internet Explorer	Opera	Safari
Basic support	?	?	?	?	?

Mobile

Feature	Android	BlackBerry	Chrome for mobile	Firefox Mobile (Gecko)	IE Mobile	Opera Mobile	Opera Mini	Safari Mobile
Basic support	?	?	?	?	?	?	?	?

Search

checked

How to Use

checked

Summary

Examples

Notes

Remarks

Syntax

Standards information

Compatibility

Desktop

Mobile

See also

Related pages (MSDN)