Mega Code Archive
Radio defaultChecked
<![CDATA[
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>
]]>