CHECKED Attribute | checked参数属性 | DHTML文档教程 |
Sets or retrieves the state of the check box or radio button.
dhtml语法
HTML <ELEMENT CHECKED ... > Scripting object.checked [ = bChecked ]
DHTML可能的值
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.
DHTML代码范例
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.
是否符合公共标准
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
更多语法参考
defaultchecked, Introduction to Forms