CHECKED Attribute | checked Property

DHTML, HTML, & CSS

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DHTML Properties

Web Workshop | DHTML, HTML & CSS

CHECKED Attribute | checked Property

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

Syntax

HTML <ELEMENT CHECKED = bChecked ... >

Scripting input.checked [ = bChecked ]

HTML	<ELEMENT CHECKED = bChecked ... >
Scripting	input.checked [ = bChecked ]

Possible Values

bChecked Boolean that specifies one of the following values:

false Control is not selected.

true Control is selected.

The property is read/write with a default value of false.

Expressions can be used in place of the preceding value(s), as of Microsoft® Internet Explorer 5. For more information, see dynamic properties.

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.

Example

This example retrieves the checked property to fire an event.

Sample Code
<HEAD>
<SCRIPT>
function checkthis()
{
    if (oCheckbox.checked == true)
    {
        alert("It's got a check; now off to Microsoft!");
        window.open("http://www.microsoft.com");
    }
}
</SCRIPT> 
</HEAD>
<BODY>
Check here if you wish to go to Microsoft:
<INPUT ID=oCheckbox TYPE=checkbox onclick=checkthis()>
</BODY>
This feature requires Internet Explorer 4.0 or later. Click the icon below to install the latest version. Then reload this page to view the sample.

Applies To

[ Object Name ]

Platform Version

Win16:

Win32:

Mac:

Unix:

WinCE:

Version data is listed when the mouse hovers over a link, or the link has focus.

INPUT TYPE=checkbox, INPUT TYPE=radio