CHECKED Attribute | checked Property | Internet Development Index |
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>
Standards Information
This property is defined in HTML 3.2 and is defined in World Wide Web Consortium (W3C) Document Object Model (DOM) Level 1 .
Applies To
INPUT type=checkbox, INPUT type=radio
See Also
defaultChecked, Introduction to Forms