Radio.defaultChecked : Radio Button « Form « JavaScript Tutorial






  1. JavaScript Tutorial
  2. Form
  3. Radio Button

The defaultChecked property is a Boolean value that reports which radio buttons contain the HTML CHECKED attribute.

If the CHECKED attribute is contained in the Radio object, true is returned. Otherwise, false is returned.

<html>
    <head>
    <title> Example of the radio defaultChecked property</title>
    </head>
    <body>
    <script language="JavaScript">
    <!--
    function checkBox(){
        if(document.form1.button1.defaultChecked == true){
            alert("Box1 is checked by default");
        } else if(document.form1.button2.defaultChecked == true){
            alert("Box 2 is checked by default");
        }
    }
    -->
    </script>
    <form name="form1">
    <input type="radio" name=button1>Box 1
    <br>
    <input type="radio" name=button2 CHECKED>Box 2
    <br><br>
    <input type="button" value="Get Default" onClick='checkBox()'>
    </form>
    </body>
    </html>








10.11.Radio Button
10.11.1.Radio
10.11.2.Radio.blur()
10.11.3.Radio.checked
10.11.4.Radio.click()
10.11.5.Radio.defaultChecked
10.11.6.Radio.focus()
10.11.7.Radio.form
10.11.8.Radio.handleEvent()
10.11.9.Radio.name
10.11.10.Radio.onBlur
10.11.11.Radio.onClick
10.11.12.Radio.onFocus()
10.11.13.Radio.type
10.11.14.Radio.value
10.11.15.Checking a Radio Button Group
10.11.16.With with RADIO and CheckBox
10.11.17.Cycle the selected radio buttons
10.11.18.An onclick Event Handler for Radio Buttons