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Q: get value of checkbox via javascript

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bjlt
Senior Member

1144 Posts

Posted - 01 November 2003 : 04:36:08

My knowledge on javascript is limited. What I want to do is to pass the value of selected checkbox.

codes below, I got an undefined error.


<html>
<head>
<script language="JavaScript">
<!--
function test()
	{alert(document.form1.a.value);}
//-->
</script>
</head>

<body>
<form method=post action="" name="form1" id="form1">
<input type="checkbox" name="a" value=1>
<input type="checkbox" name="a" value=2>
<input type="checkbox" name="a" value=3>
<input type="button" onclick="test();">
</form>
</body>
</html>

Thanks in advance.

edit: highlighted codes in question.

Edited by - bjlt on 01 November 2003 04:40:53

RichardKinser
Snitz Forums Admin

USA
16655 Posts

Posted - 01 November 2003 : 05:10:14

try this function:

function test(){
	var allChecked = new Array();
	for(i = 0; i < document.form1.a.length; i++)
		if(document.form1.a[i].checked)
			allChecked[allChecked.length] = document.form1.a[i].value;
		alert (allChecked);
}

bjlt
Senior Member

1144 Posts

Posted - 01 November 2003 : 05:37:14

Then it's not possible to obtain the value of the selected multiple checkbox without calling each index, while you can do it if the selection is not multiple.

Thanks Richard.

RichardKinser
Snitz Forums Admin

USA
16655 Posts

Posted - 01 November 2003 : 05:51:12

you're welcome.

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