CHECKED Attribute | checked Property

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

Syntax

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

Possible Values

bChecked Boolean that specifies or receives one of the following values.
false Default. Control is not selected.
true Control is selected.
The property is read/write. The property has a default value of false.

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.
<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 Microsoft® Internet Explorer 4.0 or later. Click the following icon to install the latest version. Then reload this page to view the sample.

Standards Information

property is defined in HTML 3.2 and defined in World Wide Web Consortium (W3C) Document Object Model (DOM) Level 1 .

Applies To

INPUT type=checkbox, INPUT type=radio