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How to get the selected value in a radiobutton in javascript?

Posted on 2010-11-07
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Last Modified: 2012-08-13
Hello,

I have 4 radio buttons (all radiobuttons have the same "name" & same "id" but diff. "values")with a normal button beside it. When I click on the normal button, I want to be able to get the selected radiobutton's value through a function call. How do I do that in javascript?
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Question by:dustbunnies
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3 Comments
 
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sam2912 earned 2000 total points
ID: 34082322

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Get Radio Button Value</title>
<script type="text/javascript">
function getRadio(radioName) {
	var radios = document.getElementsByName(radioName);
	
	for(var i=0; i<radios.length; i++) {
		if(radios[i].checked == true) return radios[i].value;
	}
}
</script>
</head>

<body>
<input name="radio" id="radio" type="radio" value="1" /><br />
<input name="radio" id="radio" type="radio" value="2" /><br />
<input name="radio" id="radio" type="radio" value="3" /><br />
<input name="" type="button" value="Get Value of Selected Radio" onclick="alert( getRadio('radio') );" />
</body>
</html>

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LVL 14

Expert Comment

by:sam2912
ID: 34082363
By the way, id should be unique.
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Author Closing Comment

by:dustbunnies
ID: 34082422
Thanks!
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